IIT-JAM CHEMISTRY TEST : STEREOCHEMISTRY Time 00 : 45 Hour Date : M.M. : 35 INSTRUCTION:
|
|
|
- Gary Dorsey
- 5 years ago
- Views:
Transcription
1 1 T-JAM EMSTRY TEST : STEREEMSTRY Time 00 : 45 our Date : M.M. : 35 NSTRUTN: 1. Attempt all the questions. 2. Section-A contains 10 Multiple hoice Questions (MQ). Each question has 4 choices (a), (b), (c) and (d), for its answer, out of which NLY NE is correct. From Q.1 to Q.5 carries 1 Marks and Q.6 to Q.10 carries 2 Marks each. 3. Section-B contains 05 Multiple Select Questions(MSQ). Each question has 4 choices (a), (b), (c) and (d) for its answer, out of which NE or MRE than NE is/are correct. For each correct answer you will be awarded 2 marks. 4. Section- contains 06 Numerical Answer Type (NAT) questions. Q.16 to Q.17 carry 1 Mark and Q.18 to Q.21 carries 2 Marks each. For each NAT type question, the value of answer in between 0 to n all sections, questions not attempted will result in zero mark. n Section A (MQ), wrong answer will result in negative marks. For all 1 mark questions, 1/3 marks will be deducted for each wrong answer. For all 2 marks questions, 2/3 marks will be deducted for each wrong answer. n Section B (MSQ),there is no negative and no partial marking provisions. There is no negative marking in Section (NAT) as well. PART-A Q.1 to Q.05: arry 1 Mark each. 1. The absolute configuration of the compound A and B, are respectively (A) N N N N (B) 3 (a) R, S (b) S, R (c) R, R (d) S, S 2. The absolute configuration of the compound A and B, are respectively N 2 l 3 (A) 2 N (B) (a) R, R (b) S, R (c) S, S (d) R, S South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
2 3. Assign the configuration of the following compound A and B, are respectively ( 2 ) 3 (A) (B) (a) S, S (b) R, R (c) R, S (d) S, R 4. The configuration at the two stereocentres in the compound given below are 1 4 (a) 1R, 4R (b) 1R, 4S (c) 1S, 4R (d) 1S, 4S 5. Among A-, the compounds which can exhibit optical activity are Ph Ph N S Ph (A) (B) () (a) A, B and (b) A and B only (c) A and only (d) B and only Q.6 to Q.10: arry 2 Marks each. 6. n the compound give below, the relation between A, B ; and between 1, 2 is: A B 1 2 (a) A, B are enantiotropic; and 1 2 are diastereotopic (b) A, B are diastereotopic; and 1, 2 are enantiotopic (c) A, B are diastereotopic; and 1, 2 are homotopic (d) A, B are enantiotropic; and 1, 2 are homotopic. 7. dentify two enantiomers among the following compounds 3 3 (A) 3 3 (B) 3 () 3 3 (D) 3 (a) A and B (b) A and (c) B and D (d) and D South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
3 8. The correct statement about the following compound is 3 (a) compound is chiral and has P configuration (b) compound is chiral and has M configuration (c) compound is achiral as it possesses 2 -axis of symmetry (d) compound is achiral as it possesses plane of symmetry 9. Among the following, the Newmann projections of meso-2, 3-butanediol are (a) (b) (c) (d) 10. For the compound the stereochemical notations are (a) 2Z, 4R (b) 2Z, 4S (c) 2E, 4R (d) 2E, 4S PART-B Q.11 to Q.15: arry 2 Marks each. 11. n the following compounds, which are identical 2 S 3 (a) 2 l (b) 3 2 l 2 S 2 S (c) l n the following structure, meso compound is/are (d) 3 2 S 3 (a) (b) 3 3 l 3 (c) N 2 l 3 3 l N 2 (d) South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
4 13. n the following compound, correct option is/are A 2 2 A 3 B 3 A S S S B B (a) A and B are homotopic in nature (c) A and B are enantiotopic A B (b) 3 and 3 are diastereotopic (d) A and B are enantiotopic 14. n the given conformations, the correct option is/are () () () (V) (a) onformers ( and V) and (, ) are identical and each is 2R, 3S (b) There are no enantiomeric pair (c) Projection ( and V) of tartaric acid are diastereomeric with projection ( and ) (d) Projection ( and V) are meso conformation of tartaric acid 15. The correct statement about the following molecule is (a) Molecular is chiral and possesses a chiral plane (b) Molecule is chiral and possesses a chiral axis. (c) Molecule is achiral as it possesses a plane of symmetry. (d) Molecule is achiral as it possesses a centre of symmetry. Q.16 to Q.17: arry 1 Mark each. PART- 16., in the following compound, how many 2 symmetry present. South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
5 N 2 N The number of compounds having 2 axis of symmetry Q.18 to Q.21: arry 2 Marks each. 18. The number of compounds having 3 axis of symmetry 3 (1) 3 3 (2) (3) BF (4) (5) 19. Total number of optically active compound is/are Ph 2 3 N S 2 3 South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
6 S 2 N N N N 2 2 S N N 2 l l Pt l l The number of compounds having 2 axis of symmetry 21. onsider the given structure, how many correct option is () () () (a) All are diastereomers (b) All are identical (c) nly and are diastereomers (d) UPA name of compound is 2R, 3R, tartaric acid. (e) () and () are enantiomers (f) () and () are diastereomers. (g) () and () are identical. South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
7 Space for rough work 7 South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
8 8 T-JAM EMSTRY TEST : STEREEMSTRY Time 00 : 45 our Date : M.M. : 35 ANSWER KEY SETN-A (Multiple hoice Questions (MQ)) 1. (c) 2. (b) 3. (d) 4. (a) 5. (c) 6. (b) 7. (d) 8. (a) 9. (a) 10. (d) SETN-B (Multiple Select Questions (MSQ)) 11. (a,c) 12. (a,b,c,d) 13. (a,b,c) 14. (c,d) 15. (a) SETN- (Numerical Answer Type (NAT)) 16. (3) 17. (3) 18. (4) 19. (2) 20. (8) 21. (0) South Delhi : 28-A/11, Jia Sarai, Near-T auz Khas, New Delhi-16, Ph : , North Delhi : 33-35, Mall Road, G.T.B. Nagar (pp. tro Gate No. 3), Delhi-09, Ph: ,
CSIR-UGC-NET/JRF GATE CHEMISTRY TEST : GENERAL ORGANIC CHEMISTRY (GOC)
2 1 SIR-UG-ET/JRF GATE EMISTRY TEST : GEERAL RGAI EMISTRY (G) Time 00: 50 our Date : 18-09-2017 M.M. : 60 ISTRUTI : 1. There are Two Parts. Part-A contains 10 objective type questions, each question carry
Regn. No. South Delhi : 28-A/11, Jia Sarai, Near-IIT Metro Station, New Delhi-16, Ph : ,
1 2. Section-A contains 30 Multiple Choice Questions (MCQ). Each question has 4 choices,, and, for its answer, out of which LY E is correct. From Q.1 to Q.10 carries 1 Marks and Q.11 to Q.30 carries 2
Regn. No. North Delhi : 33-35, Mall Road, G.T.B. Nagar (Opp. Metro Gate No. 3), Delhi-09, Ph: ,
1. Section-A contains 0 Multiple Choice Questions (MCQ). Each question has 4 choices (a), (b), (c) and (d), for its answer, out of which ONLY ONE is correct. From Q.1 to Q.10 carries 1 Marks and Q.11 to
South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, New Delhi-16, Ph : ,
1 South Delhi : 28-A/11, Jia Sarai, ear-iit auz Khas, ew Delhi-16, : 011-26851008, 26861009 orth Delhi : 33-35, Mall Road, G.T.B. agar (pp. tro Gate o. 3), Delhi-09, : 011-65462244, 65662255 2 PART - A
(A) II > I > III > IV (B) II > I > IV > III (C) III > IV > I > II (D) IV > II > I > III 2. The major product formed in the following reaction is (C)
Section-A Multiple Choice Questions (MCQ) Q.1 Q.10 carry NE mark each. 1. The correct order of pka for the following compounds is 1 C 3 C C N N (I) (II) (III) (IV) II > I > III > IV II > I > IV > III III
For each of the pairs shown below, choose the statements that can be used to describe the drawings and their relationship, if a relationship exists.
I. ( points) ame Page or each of the pairs shown below, choose the statements that can be used to describe the drawings and their relationship, if a relationship exists. (a) (b) and : "heck" any/all descriptions
Regn. No. South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, New Delhi-16, Ph : ,
1 2. Section-A contains 30 Multiple Choice Questions (MCQ). Each question has 4 choices,, and, for its answer, out of which LY E is correct. From Q.1 to Q.10 carries 1 Marks and Q.11 to Q.30 carries 2
Stereochemistry Terminology
Stereochemistry Terminology Axis of symmetry: When an operation on an axis C n, where n = 360 /rotation, leads to a structure indistinguishable from the original. C 2 180 Plane of symmetry: (σ) A plane
Due Date: 2) What is the relationship between the following compounds?
Assignment #5 Name CHEM201 Student #: Due Date: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What type of isomers are CH3CH2OCH3 and CH3CH2CH2OH?
Eliel, E.L.: Wilen, S.H. Stereochemistry of Organic Compounds, Wiley, New York, 1994.
Chem 233 Course Glossary George O Doherty For an authoritative treatment of Organic stereochemistry see: Eliel, E.L.: Wilen, S.H. Stereochemistry of Organic Compounds, Wiley, New York, 1994. Relationships
Organic Chemistry Chapter 5 Stereoisomers H. D. Roth
Organic Chemistry Chapter 5 Stereoisomers. D. Roth 11. Chirality of conformationally mobile systems ring compounds Monosubstituted cycloalkanes cannot have an asymmetric carbon in the ring, because there
O N N. electrons in ring
ame I. ( points) Page 1 A. The compound shown below is a commonly prescribed antifungal drug. It belongs to a category of compounds known as triazoles. Analyze the geometry and other properties for various
Regn. No. North Delhi : 33-35, Mall Road, G.T.B. Nagar (Opp. Metro Gate No. 3), Delhi-09, Ph: ,
. Sectio-A cotais 30 Multiple Choice Questios (MCQ). Each questio has 4 choices (a), (b), (c) ad (d), for its aswer, out of which ONLY ONE is correct. From Q. to Q.0 carries Marks ad Q. to Q.30 carries
Sometimes the DEPT function stops working or the undergraduate NMRs at your University don't have the DEPT option. This is the situation here.
) Calculate the degree of unsaturation for the formula (C9H2) ( pt) H-NMR NMR (Show structure fragment work in spectrum) (2 pts) 2H 8H 3 2 3 C-NMR (Show structure fragments work in spectrum) (2 pts). Sometimes
CHEM 241 CHIRALITY CHAP 4 ASSIGN
EM 241 IRALITY AP 4 ASSIGN 1. Assume that a particular reaction gives the following two enantiomers as products in the following ratio. What is the enantiomeric excess (% ee) associated with this reaction?
STEREOCHEMISTRY A STUDENT WHO HAS MASTERED THE MATERIAL IN THIS SECTION SHOULD BE ABLE TO:
STEREOEMISTRY A STUDENT WO AS MASTERED TE MATERIAL IN TIS SETION SOULD BE ABLE TO: 1. Determine the relationship between two given structures (which may be any of the kinds below). Also, define each of
Enantiomers. nonsuperimposable mirror image Both Configuration will be opposite. Both Configuration will be opposite
Optical Isomerism Isomerism of Organic Molecules: Two chiral centers Many organic compounds have more than one asymmetric carbon. The more asymmetric carbons a compound has, the more number of stereoisomers
"Check" all descriptions that apply. is a meso compound has at least one chiral diastereomer has an enantiomer has at least one achiral diastereomer
I. ( points) ame Page For each of the compounds shown below: () Identify any sources of stereochemistry by circling the site(s) and providing appropriate stereolabel(s) for each site. If no stereochemistry
4Types of Isomers. 1. Structural Isomers/(Constitutional) 2. Geometric Isomers/(Cis/Trans) 3. Optical Isomers A. Enantiomers B.
4Types of Isomers 1. Structural Isomers/(Constitutional) 2. Geometric Isomers/(Cis/Trans) 3. Optical Isomers A. Enantiomers B. Diastereomers 4Types of Isomers C 4 10 C 4 10 O O O O O O O O O O O O C 3
Lesson 4. Molecular Geometry and Isomers II. Lesson 4 CH 3 HO H OH
Lesson 4 Molecular Geometry and Isomers II 4 Lesson 4 3 O O 3 Organic Edge A. Structural Isomers (onstitutional Isomers) 1. Structural isomers are molecules that share the same molecular formula but differ
UGC POINT ACADEMY LEADING INSTITUE FOR CSIR-JRF/NET, GATE & JAM CHEMICAL SCIENCE TEST SEREIS # 2. Organic Chemistry. Instructions
UGC PINT ACADEMY LEADING INSTITUE FR CSIR-JRF/NET, GATE & JAM BKLET CDE C Date: 24/11/2015 CEMICAL SCIENCE TEST SEREIS # 2 rganic Chemistry SUBJECT CDE 01 Timing: 2:00 Maximum Marks: 80 Instructions 1.
Option II: Chiral + Achiral = Optically Active Diastereomers
Option II: Chiral + Achiral = Optically Active Diastereomers What about additions to chiral alkenes? The previous examples were reactions done on achiral alkenes. What is the difference when an alkene
2.0 h; 240 points please print clearly Dr. Kathleen Nolta Signature. Problem Points Score GSI I 42 II 35 III 36 IV 46 V 42 VI 39 Total 240
hemistry 10 irst ame inal Examination Last ame.0 h; 0 points please print clearly Dr. Kathleen olta ignature UM ID # Problem Points core GI I II 5 III IV V VI 9 Total 0 Precision in drawing counts. heck
Second Exam CHEM 255 Organic Chemistry I Prof. Bastin Fall 2011
Second Exam CEM 255 rganic Chemistry I Prof. Bastin Fall 2011 Name Provide clear, concise answers using unambiquous, carefully drawn structures (where appropriate) for all of the questions. 1) /6 pts 2)
HO C. Explain briefly (in one or two short sentences) the meaning of the following basic stereochemical terms.
Chem 232 D. J. Wardrop wardropd@uic.edu Problem et 3 Answers Question 1. Four compounds, each having the molecular formula C 3 5, have the I spectra summarized below. What are their structures? a. ne sharp
Regn. No. North Delhi : 33-35, Mall Road, G.T.B. Nagar (Opp. Metro Gate No. 3), Delhi-09, Ph: ,
1. Section-A contains Multiple Choice Questions (MCQ). Each question has 4 choices, (b), (c) and, for its answer, out of which ONLY ONE is correct. From Q.1 to Q.1 carries 1 Marks and Q.11 to Q. carries
Dr. Steven Pedersen July 28, Chemistry 3A. Midterm 2
Dr. Steven Pedersen July 28, 2015 hemistry A Midterm 2 Student name: ANSWER KEY Student signature: Problem 1 Problem 2 Problem Problem 4 Problem 5 Problem 6 Problem 7 Total Points (16 pts) (4 pts) (2 pts)
Stereochemistry Structural or constitutional isomers... have the same molecular formula but different connectivity (skeletal, positional, functional)
Stereochemistry Structural or constitutional isomers... have the same molecular formula but different connectivity (skeletal, positional, functional) Stereoisomers... have the same connectivity but a different
STEREOCHEMISTRY A STUDENT SHOULD BE ABLE TO:
A STUDENT SHOULD BE ABLE TO: STEREOCHEMISTRY 1. Determine the relationship between two given structures (which may be any of the kinds below). Also, define the following terms, and give examples of pairs
CEM 251 Exam 3A Spring 2018
A Α NAME Section CEM 251 Exam 3A Spring 2018 READ TIS! Bubble in your PID in the space above. Write your answer for each question in the space provided. Score The absence of any of the above identifiers
Regn. No. South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, New Delhi-16, Ph : ,
. Section-A contains Multiple Choice Questions (MCQ). Each question has 4 choices,, and, for its answer, out of which ONLY ONE is correct. From Q. to Q. carries Marks and Q. to Q. carries Marks each..
Chemistry 201. MW 12:00pm 1:15pm Examination #2 August 15 th Bronco ID. Question Score Possible Points. 1 (12pts) 2 (24pts) 3 (25pts)
Chemistry 201 MW 12:00pm 1:15pm Examination #2 August 15 th 2016 Name Bronco ID. Question Score Possible Points 1 (12pts) 2 (24pts) 3 (25pts) 4... (12pts) 5 (27pts). Total (100pts) 1. Read each question
STEREOGENIC CENTER (Chiral Center,Asymmetric Center) Atom (usually carbon) to which 4 different groups are attached: W Z C X Y
STEREOGENI ENTER (hiral enter,asymmetric enter) Atom (usually carbon) to which 4 different groups are attached: W Z X Y Many, but not all, molecules which contain a stereogenic center are chiral. (A molecule
STEREOCHEMISTRY AND STEREOELECTRONICS NOTES
- 1 - STEREOCHEMISTRY AND STEREOELECTRONICS NOTES Stereochemistry in Organic Molecules Conventions used in drawing molecules Also, Fischer projections can sometimes be useful for acyclic molecules with
STEREOCHEMISTRY. 2. Define the following, and tell whether or not a given compound or structure fits the description or possesses the feature.
A STUDENT SOULD BE ABLE TO: STEREOEMISTRY 1. Determine the relationship between two given structures (which may be any of the kinds below). Also, define each of the following terms, and give examples of
Regn. No. South Delhi : 28-A/11, Jia Sarai, Near-IIT Hauz Khas, New Delhi-16, Ph : ,
1. Section-A contains 3 Multiple Choice Questions (MCQ). Each question has 4 choices,, and, for its answer, out of which ONLY ONE is correct. Fro Q.1 to Q.1 carries 1 Marks and Q.11 to Q.3 carries Marks
deduction of ⅓ marks for a 1-mark question and ⅔ marks for a 2-mark question. 8. Non-programmable type Calculator is allowed
1. This question paper consists of sections, General Aptitude (GA) for 15 marks and the subject specific GATE paper for 85 marks. Both these sections are compulsory. The GA section consists of 10 questions.
Practice Exam #1. Massachusetts Institute of Technology. Chemistry 5.43 February 21, Professor M. Movassaghi. /08 points.
Massachusetts Institute of Technology Chemistry 5.43 February 21, 2007 Professor M. Movassaghi Practice Exam #1 Question 1a Question 1l Question 1b /02 points Question 1m Question 1c /03 points Question
Regn. No. South Delhi : 28-A/11, Jia Sarai, Near-IIT Metro Station, New Delhi-16, Ph : ,
1. Section-A contains 3 Multiple Choice Questions (MCQ). Each question has 4 choices (a), (b), (c) and (d), for its answer, out of which ONLY ONE is correct. From Q.1 to Q.1 carries 1 Marks and Q.11 to
For each of the pairs shown below, choose the statements that can be used to describe the drawings and their relationship, if a relationship exists.
I. ( points) ame Page or each of the pairs shown below, choose the statements that can be used to describe the drawings and their relationship, if a relationship exists. (a) (b) and : "Check" any/all descriptions
deduction of ⅓ marks for a 1-mark question and ⅔ marks for a 2-mark question. 8. Non-programmable type Calculator is allowed
1 2. This question paper consists of 2 sections, General Aptitude (GA) for 15 marks and the subject specific GATE paper for 85 marks. Both these sections are compulsory. The GA section consists of 10 questions.
Names. Chiral: A chiral object is not superimposable upon its mirror image. A chiral object contains the property of "handedness.
CEM 241 IN-CLASS #3 MOLECULAR MODELS EXERCISE Names Stereoisomerism Construct a model containing a tetrahedral carbon (black ball) that is attached to four different atoms (use the green, orange, purple
10/4/2010. Sequence Rules for Specifying Configuration. Sequence Rules for Specifying Configuration. 5.5 Sequence Rules for Specifying.
5.5 Sequence Rules for Specifying Configuration Configuration The three-dimensional arrangement of substituents at a chirality center Sequence rules to specify the configuration of a chirality center:
STEREOGENIC CENTER (Chiral Center,Asymmetric Center)
STEREOGENI ENTER (hiral enter,asymmetric enter) Atom (usually carbon) to which 4 different groups are attached: W Z X Y Many, but not all, molecules which contain a stereogenic center are chiral. (A molecule
CHEM1102 Worksheet 4 Answers to Critical Thinking Questions Model 1: Infrared (IR) Spectroscopy
CEM1102 Worksheet 4 Answers to Critical Thinking Questions Model 1: Infrared (IR) Spectroscopy 1. See below. Model 2: UV-Visible Spectroscopy 1. See below. 2. All of the above. 3. Restricted to the identification
Solutions 80 CHAPTER a) trans b) not stereoisomeric c) trans d) trans e) trans f) not stereoisomeric g) cis
80 CAPTE 5 killbuilder 5.9 Assigning configuration from a Fischer projection AIG TE CFIGUATI F TE CIALITY CETE I TE FLLWIG CMPUD C 2 olutions 5.1. trans not stereoisomeric trans trans trans f) not stereoisomeric
Dr. Steven Pedersen November 9, Chemistry 3A. Midterm 2
Dr. Steven Pedersen November 9, 2016 Student name: ANSWER KEY Chemistry 3A Midterm 2 Student ID: (Also include your SID in the top left corner of each page) Student signature: Problem 1 Problem 2 Problem
CHEM J-10 June The structure of ( )-linalool, a commonly occurring natural product, is shown below.
CEM1102 2014-J-10 June 2014 The structure of ( )-linalool, a commonly occurring natural product, is shown below. 4 What is the molecular formula of ( )-linalool? C 10 18 O Which of the following best describes
If Compound 2 (below) was used in the above reaction, how might things change? Name Page 1. I. (23 points)
I. (2 points) ame Page itrogen atoms in amines can undergo substitution reactions repeatedly under mildly basic conditions. Provide the structure of the starting amine and supply the missing reagent(s).
"Pip tazo" is a nickname given to a popular combination of antibiotics prescribed for a variety of infections. A.
ame I. ( points) Page 1 "Pip tazo" is a nickname given to a popular combination of antibiotics prescribed for a variety of infections. A. piperacillin tazobactam (a) ircle all the tetrahedral (chiral)
MULTIPLE CHOICE QUESTIONS Stereochemistry
MULTPLE COCE QUESTONS Stereochemistry Topic: dentifications and Comparisons Answers on page 10 1. Which of the following is the enantiomer of the following substance? C 3 C 3 C 3 C 3 A) B) C) D) t does
HO HO. 1) BH 3 HCl. + enantiomer either one may be drawn 4. + enantiomer either one may be drawn 4 1) O 3
. (0 points) Page 1 A. Reaction analysis: provide the requested information in each of the following chemical transformations. how all missing starting materials and products unless otherwise indicated,
Stereochemistry Terminology for two pure isomeric compounds, both of which are chiral? A pair of stereoisomers
Name Last, irst STEECEMISTY This handout will help you understand stereoisomerism, naming conventions and relationships between stereoisomers. I hope that you will use this to help you study for exam 1.
(S)-(-)-Dopa, used to treat Parkinson's disease, and its medically ineffective (R)-(+) enantiomer
C h a p t e r F i v e: Stereoisomerism N 2 2 N (S)-(-)-Dopa, used to treat Parkinson's disease, and its medically ineffective (R)-(+) enantiomer CM 321: Summary of Important Concepts YConcepts for Chapter
Chapter 6 Principles of Stereochemistry
6.1 (a) This compound is chiral. Methane is achiral. Instructor Supplemental Solutions to Problems 2010 Roberts and Company Publishers Chapter 6 Principles of Stereochemistry Solutions to In-Text Problems
1. (3 pts) Circle the highest priority substituent of the following list:
Ch 334 Midterm #3 November 17, 2006 Code 1. (3 pts) Circle the highest priority substituent of the following list: 2. (4 pts) Rank the following groups in order of increasing priority. Place the letter
H C C C C H C H C C H OH. Cl H CH 3. Br CH 3. H Br H OH H 3 C. CHEMISTRY MIDTERM # 3 June 17, Name...
Name... CEMISTRY 313-61 MIDTERM # 3 June 17, 2005 The total number of points in this midterm is 100. The total exam time is 90 min (1.5 h). Good luck! 1. (10 pts) Mark as true (T) false () the following
Stereochemistry. 3-dimensional Aspects of Tetrahedral Atoms
Stereochemistry 3-dimensional Aspects of Tetrahedral Atoms Chiral Entire molecules or simply atoms that do not possess a plane of symmetry are called chiral. Conversely, the term achiral is applied to
Spin-Spin Coupling. H b1 H 3 C C Br. Review: 1 H- 1 H Coupling
Review: 1-1 Coupling b1 3 C C Br b2 multiplicity: n + 1 rule can determine peak intensities by considering nuclear spin probabilities on adjacent hydrogens or use Pascal's triangle Coupling Constants (J)
2 h; 240 points Signature UM ID # Problem Points Score GSI I 42 II 45 III 35 IV 46 V 36 VI 36 Total 240
hemistry 10 First ame Final Examination Last ame June 5, 01 please print clearly h; 0 points Signature UM ID # PRIT TE FIRST LETTER F YUR LAST AME ERE: Problem Points Score GSI I II 5 III 5 IV V VI Total
Chapter 6. Isomers and Stereochemistry
Chapter 6. Isomers and Stereochemistry Learning objectives: 1. Differentiate chiral and achiral molecules. 2. Recognize and draw structural isomers (constitutional isomers), stereoisomers including enantiomers
180 C 2 -C 3 bond rotation
I. ( points) Valnoctamides have been used as sedatives and inducers for hypnosis for decades. The most biologically active molecule from this class of compounds is shown. Using ewman projections, analyze
"Pip tazo" is a nickname given to a popular combination of antibiotics prescribed for a variety of infections. A.
ame I. (6 points) Page 1 "Pip tazo" is a nickname given to a popular combination of antibiotics prescribed for a variety of infections. (a) ircle all the tetrahedral (chiral) stereocenters in both piperacillin
Stereochemistry. Based on McMurry s Organic Chemistry, 6 th edition
Stereochemistry Based on McMurry s Organic Chemistry, 6 th edition Stereochemistry! Some objects are not the same as their mirror images (technically, they have no plane of symmetry)! A right-hand glove
PAPER : IIT-JAM 2016 CHEMISTRY-CY
82 CEMISTRY-CY 1. Section-A contains 30 Multiple Choice Questions (MCQ). Each question has 4 choices (a), (b), (c) and (d), for its answer, out of which NLY NE is correct. From Q.1 to Q.10 carries 1 Marks
Experiment 8 Optical Isomers. In this experiment you will be given the opportunity to see the 3-dimensional aspects of
Experiment 8 Optical Isomers In this experiment you will be given the opportunity to see the 3-dimensional aspects of stereochemistry and optical isomers. Previously in class you were exposed to the concept
CHAPTER 5. Stereoisomers
CHAPTER 5 Stereoisomers We have already covered two kinds of isomerism: Constitutional Isomers (structural isomers) Stereoisomers Examples of Constitutional Isomers: Examples of Stereoisomers: Another
Stereochemistry. In organic chemistry, subtle differences in spatial arrangements can give rise to prominent effects.
Stereochemistry This is study of the 3 dimensional arrangement in space of molecules. In organic chemistry, subtle differences in spatial arrangements can give rise to prominent effects. E.g. the isomers
B. A transition state represents a maximum on the reaction path diagram and can be isolated.
Practice Hour Exam 2, Chemistry 2210, Organic Chemistry I 1. The most stable carbocation is: 2. Which of the following statements is true of transition states? A. A transition state represents a minimum
240 Chem. Stereochemistry. Chapter 5
240 Chem Stereochemistry Chapter 5 1 Isomerism Isomers are different compounds that have the same molecular formula. Constitutional isomers are isomers that differ because their atoms are connected in
ON THE FIRST DAY OF CHRISTMAS DR. RUSSELL GAVE TO ME, ORGANIC CHEMISTRY... Thanks to Dr R for the title!
N TE FIRST DAY F RISTMAS DR. RUSSELL GAVE T ME, RGANI EMISTRY... Thanks to Dr R for the title! rganic hemistry E 310, Final Exam 150 cautiously optimistic points! December 11, 2017 Note: This exam totals
C 4 H 10 O. butanol. diethyl ether. different carbon skeleton different functional group different position of FG
hapter 5: Stereoisomerism- three-dimensional arrangement of atoms (groups) in space 5. verview of Isomerism Isomers: different chemical compounds with the same formula onstitutional isomers: same formula,
4 1,2,3 - Clockwise 1,2,3 - Counterclockwise S
Assigning Stereochemistry using Fischer Projections: Fischer projections can be used to assign stereochemistry. If the th (lowest) priority group is vertical the other three groups will show clockwise
CHEM 263 Oct 18, Do they have the same molecular formula?
EM 263 ct 8, 206 To compare the relationship of 2 structures: Do they have the same molecular formula? o ot isomers Do they have the same sequence of atoms (i.e. connectivity)? o onstitutional or tructural
CHEM Exam 2 ANSWER KEY
CEM 3311-200 Exam 2 ANSWER KEY ctober 23, 2012 Time: 2 ours Please copy and sign the onor Pledge on the scantron sheet in the space below the double lines. I pledge that n my honor, as a University of
Suggested solutions for Chapter 14
s for Chapter 14 14 PRBLEM 1 Are these molecules chiral? Draw diagrams to justify your answer. 2 C 2 C Reinforcement of the very important criterion for chirality. Make sure you understand the answer.
1 st -order spin-spin coupling. 2 nd -order spin-spin coupling. ν/j < 10
1 st -order spin-spin coupling We observe 1 st -order NMR spectra when the frequency difference between the chemical shifts of any given pair of nuclei is much larger than the value of the coupling constant
CHEMISTRY 112A FALL 2015 EXAM 1 SEPTEMBER 27, 2016 NAME- WRITE BIG STUDENT ID: SECTION AND/OR GSI IF YOU ARE IN THE LABORATORY COURSE:
CHEMISTRY 112A FALL 2015 EXAM 1 SEPTEMBER 27, 2016 NAME- WRITE BIG STUDENT ID: SECTIN AND/R GSI IF YU ARE IN THE LABRATRY CURSE: You will have 75 minutes in which to work. BE NEAT! Non-legible structure
Exam 2 Chem 109a Fall 2004
Exam 2 Chem 109a Fall 2004 Please put your name and perm number on both the exam and the scantron sheet. Next, answer the following 34 multiple-choice questions on the scantron sheet. Then choose one A-type
Problem Points Score GSI I 22 II 26 III 28 IV 19 V 25 Total 120
hemistry 0 First ame econd Examination Last ame.5 h; 0 points please print clearly Dr. Kathleen olta ignature UM ID # PRIT TE FIRT LETTER F YUR LAT AME ERE: Problem Points core GI I II 6 III 8 IV 9 V 5
Stereochemistry is EZ! Thanks to Jonah H. for the title.
Stereochemistry is EZ! Thanks to Jonah. for the title. rganic Chemistry CE 310, Exam #3 100 painless points! November 17, 2017 Rules of the road: 1. There are 9 questions on 5 pages, plus a couple of extra
Organic Chemistry. M. R. Naimi-Jamal. Faculty of Chemistry Iran University of Science & Technology
Organic Chemistry M. R. Naimi-Jamal Faculty of Chemistry Iran University of Science & Technology Chapter 6. Stereochemistry Based on McMurry s Organic Chemistry, 6 th edition Stereochemistry Some objects
Physical Organic Chemistry (15 h)
Course code : CEM 43244 Course title : Advanced rganic Chemistry I Physical rganic Chemistry (15 h) Dr. Dinesh Pandithavidana E-mail: dinesh@kln.ac.lk Mobile: 0777-745-720 ffice: B1 222/3 Stereochemical
1. Make two superimposable models of bromochloroiodomethane. Position your models on your desk to prove that they are superimposable.
HM 204 Organic hemistry Introduction to Stereochemistry Recall that two models are identical if they can be superimposed without breaking bonds. Recall that conformations (conformers) are structures that
Organic Chemistry. Stereochemistry
Organic Chemistry by Nurlin Abu Samah, Dr. Md. Shaheen & Dr. Nadeem Akhtar Faculty of Industrial Sciences & Technology nurlin@ump.edu.my Chapter Description Aims The students should understand the fundamental
geometric isomers (diastereomers)
Symmetry Monarch butterfly: bilateral symmetry= mirror symmetry Whenever winds blow butterflies find a new place on the willow tree -Basho (~6-69) 5 hapter 7: Stereochemistry - three-dimensional arrangement
Electronic Spectra and Magnetic Properties of Transition Metal Complexes)
Subject Chemistry Paper No and Title Module No and Title Module Tag Paper 7: Inorganic Chemistry-II (Metal-Ligand Bonding, Electronic Spectra and Magnetic Properties of Transition Metal 22: Isomerism part
a. Does the model have a plane of symmetry? Yes No The central carbon is said to be a stereocenter, stereogenic center, or chiral carbon.
Name: TA Name Lab Section: Day Time OPTICAL ISOMERISM 1. Construct a model that has a central carbon atom with 4 different colored spheres attached to it, representing four different atoms or groups. Draw
*Assignments could be reversed. *
Name Key 5 W-Exam No. Page I. (6 points) Identify the indicated pairs of hydrogens in each of the following compounds as (i) homotopic, (ii) enantiotopic, or (iii) diastereotopic s. Write the answers as
CH 3 C 2 H 5. Tetrahedral Stereochemistry
Ch 5 Tetrahedral Stereochemistry Enantiomers - Two non-superimposable mirror image molecules - They are stereoisomers with the same atoms and bonds, but different spatial geometries. - The two molecules
ORGANIC - BROWN 8E CH.3 - STEREOISOMERISM AND CHIRALITY.
!! www.clutchprep.com CONCEPT: TYPES OF ISOMERS Isomers are used to describe relationships between similar molecules. We can order these relationships in order of increasing similarity Page 2 CONCEPT:
Name: (Print your name) Chem Spring, Midterm 1
ame: (Print your name) hem 2010 Spring, 2019 Midterm 1 hem 2010 Midterm 1 Spring, 2019 Beauchamp ame Problems Points redit 1. Functional Group omenclature (1 large structure) 30 2. Lewis Structures, Resonance,
Two enantiomers of a racemic carboxylic acid (to be separated)
7.8 FISCER PRJECTINS 237 (R)-RC 2 (S)-RC 2 Two enantiomers of a racemic carboxylic acid (to be separated) Figure 7.5 RESLUTIN F A RACEMIC CARBYLIC ACID. (S)-RN 2 ne enantiomer of a chiral amine + (R)-RC
GOODLUCK TUITION CENTER FOR CHEMISTRY. 655 A 48TH STREET 9 TH SECTOR CHENNAI - 78 Ph: Cell : ISOMERISM
GOODLUCK TUITION CENTER FOR CHEMISTRY 655 A 48TH STREET 9 TH SECTOR CHENNAI - 78 Ph: 2366 3848 Cell : 9444357037 ISOMERISM 1. Mesotartaric acid is an optically inactive compound with asymmetric carbon
STEREOCHEMISTRY CHIRALITY
TERECEMITRY CIRALITY A A C C B C D D C B Chirality - tereoisomers 2 Chirality Enantiomers - molecules that are not superimposable on their mirror image. Molecules that can exist as enantiomers are called
tbuo OtBu Br 1) B 2 H 6 /THF OH 2) OH - + H 2 O 2 NaNH 2 NH3 Na NH 3 /-35 C CH 3 CCH 2 CHCH 3
EM 12A Name KEY EXAM II all 2003 1.(16 pts) Draw the structure of the major product expected from each of the following sets of reactants. Specify stereochemistry where appropriate. + 2 Pt + 2 2 2 + enantiomer
Chemistry 3A. Midterm 2. Dr. Steven Pedersen November 9, Student name: ANSWERS Student signature:
r. Steven Pedersen ovember 9, 2015 Chemistry 3A Midterm 2 Student name: ASWERS Student signature: Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Problem 7 (18 pts) (30 pts) (32 pts) (18 pts)
Isomerism. Introduction
Isomerism Introduction The existence of two or more compounds with same molecular formula but different properties (physical, chemical or both) is known as isomerism; and the compounds themselves are called
9. Stereochemistry. Stereochemistry
9. Stereochemistry Stereochemistry Some objects are not the same as their mirror images (technically, they have no plane of symmetry) A right-hand glove is different than a left-hand glove (See Figure
Chapter 5 Stereochemistry
Organic Chemistry, Second Edition Janice Gorzynski Smith University of Hawai i Chapter 5 Stereochemistry Prepared by Rabi Ann Musah State University of New York at Albany Copyright The McGraw-Hill Companies,