1) Please give the IUPAC names for the following simple compounds

Transcription

1 1) Please give the IUPAC names for the following simple compounds 1

2 2) Please draw the chemical structure for the following compounds a) 1,6-dichlorononane b) 1-bromo--chloro-5-methylhexane c) 1-iodo-5,6,6-trimethylheptane d) 4-ethyl-2,5-dimethylheptane e) 2,,4,5,6-pentamethylheptane f) 4-bromo-2-fluoro-5-methylheptane g) 2,2,-trimethylbutane h),5-diflorocyclohexane i) This compound cannot be drawn because any cyclic must have number 1 through counting j) -Bromocyclopentane This compound cannot be drawn because any cyclic must have number 1 through counting 2

3 ) Compounds that have the same molecular formula but different chemical structures are called isomers. On the light of your understanding draw all the possible isomeric structures of C Do you think the isomers will have the same chemical and physical properties or no? Explain your answers! Isomers are different compounds that have the same molecular formula but they have different structural formula so they are completely two different compounds. They have different physical and chemical properties. 4) What is the shape of s, p, sp orbitals (draw them) and what is the type of bonds that formed as a result of overlapping between s&s, s&p, s&sp, p&p, sp &sp (please show the all possible overlapping) 5) The reaction of propane with Cl 2 in the present of sun light has produced two isomeric products x, and y in different percentage yields. I) Write the chemical structure for the two products and indicates which of them will be formed in a higher percentage than the other and explain why? Y will be formed in higher percentage because the intermediate free radical is secondary radical which is more stable than the primary free radical

4 II. In light of your understanding to hybridization and orbitals shape and overlapping; draw a sketch for any of the two products to show each type of hybridization on the C atoms and how the δ bond is formed in terms of orbitals overlapping. I. If the propane was reacted with Br 2 in the present of light; how many product do you expect to have? If more than one product will be formed what is the percentage yield do you expect for each one and why? Br 2 is highly selective so the 2 nd higher yield radical which is more stable will be formed in 4

5 6) Please underline the correct answer for the following questions 1. Arrange the following types of intermolecular forces in order of increasing strength. Ion-Ion Dipole-Dipole ydrogen Bonding London Dispersion Arrange the following compounds in the order you would think that their boiling points would be. (lowest first) Explain your order. C C C C Arrange the following compounds in the order that you think their boiling points would be. (lowest first) C 2 5 O C C Cl O Arrange the following compounds in the order that you think their solubility in water would be. (lowest first) C 2 5 O C C C 2 C 2 O C Arrange the following compounds in the order that you think their boiling points would be. (lowest first) Pentane Isopentane Butane Isobutane

6 7) Write all the possible mono-halogenation products for the following reactions 8) Write all the possible dihalogenation products for the following reactions 6

7 9) Which of the following scientific statements are true and which are false? 1) [ F ] The formal charge of O in O 2 molecule is -1 2) [ T ] Covalent bonds are formed by sharing electrons between atoms. ) [ F ] Alkanes are water insoluble due to intra-molecular forces 4) [ F ] Free radical addition is a characteristic reaction of saturated hydrocarbons 5) [ F ] Free radical chlorination of propane is the ideal method to prepare 1- chloropropane. 10) Please answer the following question in details In light of your understanding to hybridization and orbitals shape and overlapping; draw a sketch for 1-bromo--chloropropene, to show each type of hybridization on the C atoms and how the δ and bond are formed in terms of orbitals overlapping 7

8 11) Low reactivity gives high selectivity. Comment on this statement with example Cl 2 is more reactive than Br 2 and it s less selective than Br 2 12) Please give the IUBAC names for the following simple compounds 1) What is IUPAC stands for? International Union of Pure and Applied Chemistry 8