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1 metal-organic compounds Acta Crystallographica Section E Structure Reports Online ISSN (Croconato-j 2 O,O 0 )bis(1,10-phenanthroline-j 2 N,N 0 )zinc(ii) Hongyu Chen, a * Ping Li, a Lihua Dong, a Xiaohui Zhu a and Qi Fang b a School of Chemistry and Chemical Engineering, TaiShan Medical University, Tai an , People s Republic of China, and b State Key Laboratory of Crystal Materials, Shandong University, Jinan , Shandong Province, People s Republic of China Correspondence binboll@126.com Received 5 August 2008; accepted 15 October 2008 Key indicators: single-crystal X-ray study; T = 293 K; mean (C C) = Å; R factor = 0.029; wr factor = 0.096; data-to-parameter ratio = Mo K radiation = 1.11 mm 1 Data collection Bruker APEXII CCD area-detector diffractometer Absorption correction: multi-scan (APEX2; Bruker, 2005) T min = 0.743, T max = (expected range = ) Refinement R[F 2 >2(F 2 )] = wr(f 2 ) = S = reflections Table 1 Selected bond lengths (Å). N1 Zn (15) N2 Zn (17) T = 293 (2) K mm 9769 measured reflections 2627 independent reflections 2164 reflections with I > 2(I) R int = parameters H-atom parameters constrained max = 0.29 e Å 3 min = 0.32 e Å 3 O1 Zn (14) In the title compound, [Zn(C 5 O 5 )(C 12 H 8 N 2 ) 2 ], the Zn atom is in a slightly distorted octahedral environment. The molecule lies across a twofold rotation axis, around which two 1,10- phenanthroline ligands are arranged. There are short contacts between the 1,10-phenanthroline groups and the O atoms of the croconate ligand, which probably stabilize the crystal structure via weak C HO interactions. Related literature For related literature, see: Braga et al. (2002); Carranza et al. (2004); Castro et al. (1992, 2002); Chen et al. (2005, 2007, 2008); Faus et al. (1994); Maji et al. (2003); Seitz & Imming (1992); Sletten et al. (1998); Wang et al. (2002). Table 2 Hydrogen-bond geometry (Å, ). D HA D H HA DA D HA C6 H6O1 i (2) 149 C11 H11O3 ii (2) 122 Symmetry codes: (i) x; y; z 1 2 ; (ii) x 1 2 ; y 1 2 ; z þ 3 2. Data collection: APEX2 (Bruker, 2005); cell refinement: APEX2; data reduction: APEX2; program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: WinGX (Farrugia, 1999). This work was supported by the National Natural Science Foundation of China (grant No ). Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SG2254). Experimental Crystal data [Zn(C 5 O 5 )(C 12 H 8 N 2 ) 2 ] M r = Orthorhombic, Pbcn a = (4) Å b = (3) Å c = (5) Å V = (12) Å 3 Z =4 References Altomare, A., Burla, M. C., Camalli, M., Cascarano, G. L., Giacovazzo, C., Guagliardi, A., Moliterni, A. G. G., Polidori, G. & Spagna, R. (1999). J. Appl. Cryst. 32, Braga, D., Maini, L. & Grepioni, F. (2002). Chem. Eur. J. 8, Bruker (2005). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA. Carranza, J., Sletten, J., Brennan, C., Lloret, F., Cano, J. & Julve, M. (2004). Dalton Trans. p Castro, I., Calatayud, M. L., Lloret, F., Sletten, J. & Julve, M. (2002). J. Chem. Soc. Dalton Trans. pp Castro, I., Sletten, J., Faus, J., Julve, M., Journaux, Y., Lloret, F. & Alvarez, S. (1992). Inorg. Chem. 31, Chen, H.-F., Chen, H.-Y., Chen, X., Batsanov, A. S. & Fang, Q. (2008). Acta Cryst. E64, m172. Chen, X., Chen, H.-F., Xue, G., Chen, H.-Y., Yu, W.-T. & Fang, Q. (2007). Acta Cryst. C63, m166 m168. Chen, H.-Y., Fang, Q., Xue, G. & Yu, W.-T. (2005). Acta Cryst. C61, m535 m537. Farrugia, L. J. (1999). J. Appl. Cryst. 32, doi: /s Chen et al. m1507
2 metal-organic compounds Faus, J., Julve, M., Lloret, F., Real, J. A. & Sletten, J. (1994). Inorg. Chem. 33, Maji, T. K., Konar, S., Mostafa, G., Zangrando, E., Lu, T. H. & Chaudhuri, N. R. (2003). J. Chem. Soc. Dalton Trans. pp Seitz, G. & Imming, P. (1992). Chem. Rev. 92, Sheldrick, G. M. (2008). Acta Cryst. A64, Sletten, J., Daraghmeh, H., Lloret, F. & Julve, M. (1998). Inorg. Chim. Acta, 279, Wang, C.-C., Yang, C.-H. & Lee, G.-H. (2002). Inorg. Chem. 41, m1508 Chen et al. [Zn(C 5 O 5 )(C 12 H 8 N 2 ) 2 ]
3 supporting information [doi: /s ] (Croconato-κ 2 O,O )bis(1,10-phenanthroline-κ 2 N,N )zinc(ii) Hongyu Chen, Ping Li, Lihua Dong, Xiaohui Zhu and Qi Fang S1. Comment The dianion of croconic acid(4,5-dihydroxycyclopent-4-ene-1,2,3-trione), (C 5 O 5 ) 2-, is one of the cyclic aromatic 2- oxocarbons (CO) n characterized by extensive delocalization of the π electrons all over the ring (Seitz & Imming, 1992). Previous reports reveal that croconate is a polydent ligand(chen et al., 2005, Maji et al., 2003, Wang et al., 2002, Sletten et al., 1998). According to the concept of 'molecular self-organization and 'molecular engineering, transition metal croconates associated with another ligand such as terpyridine (Castro et al. 2002), bis((bis(2-pyridylcarbonyl) amido (Maji et al., 2003), 2,2 -bipyridine (Castro et al., 1992) or the tetrakis(2-pyridyl)pyrazine (Carranza et al. 2004) show interesting properties in magnetism, biochemistry, catalyst et al. 1,10-Phenanthroline(phen) is a well known neutral bidentate ligand. There have been considerable interests in the synthesis of open-framework phen-based metal complexes because of their interesting structure chemistry and potential applications(faus et al. 1994). Recently, many research activities have focused on the synthesis of hybrid framework by incorporate organic ligand in the structure of phen-based complexes. Among the family of cyclic oxocarbons of the 2- formula (CO) n [n=2 6 for oxalate, deltate, squarate, croconate and rhodizonate anions, respectively], the croconate moiety, (C 5 O 5 ) 2-, was found to be a good candidate and has been successfully incorporated into phen-based frameworks in our previous work, [M(phen) 2 (C 5 O 5 )] (M= Cu, Ni, Co, Mn) (Chen et al., 2005, 2007, 2008). Here, we report a new member of this family: [Zn(phen) 2 (C 5 O 5 )]. In the title structure, asymmetry unit contains a phen moiety and half a coroconte group coordinated with a zinc ion. The title compound lies across twofold rotation axes which passes through the Zn atom and bisects the croconate ligand, around which two phen ligand are arranged in a chiral propeller manner. A unit cell contains four [Zn(phen) 2 (C 5 O 5 )] molecules. As a good π-conjugation system, the croconate dianion('free ligand) in its simple salt has a plannar D 5 h conformation with five almost identical C?O bonds and five almost identical C?C bonds, such as in Rb 2 C 5 O 5 and Cs 2 C 5 O 5 crystals (Braga et al., 2002). However, the coordinated ligand in title complex obvioulsy deviates from D 5 h symmetry. The C?O bond involving coordinated O atoms is longer than that involving the uncoordinated O atoms. In the title complex, the C?O bond lengths are (3) Å and (4) Å for the uncoordinated O atoms and (2) Å for the coordinated O atoms. The molecuar conformation of [Zn(phen) 2 (C 5 O 5 )] is close to [Co(phen) 2 (C 5 O 5 )] and [Ni(phen) 2 (C 5 O 5 )] while different from [Cu(phen) 2 (C 5 O 5 )] and [Mn(phen) 2 (C 5 O 5 )]. The dihedral angle between the two phen planes for the title compound is 85.3 (1) and the croconate and phen planes are also effectively perpendicular, with a dihedral angle of 87.7 (1). Compared with our previous reported result(chen et al. 2005, 2007, 2008), the crystal growth method not only influence crystal packing motif, but also have effect on the moleular configuration. The crystal of [Zn(phen) 2 (C 5 O 5 )], [Co(phen) 2 (C 5 O 5 )] and [Ni(phen) 2 (C 5 O 5 )] are grown by hydrothermal method while the cyrstal of [Cu(phen) 2 (C 5 O 5 )] and [Mn(phen) 2 (C 5 O 5 )] are obtained by solvent evaporation under room temperature. Correspondingly, the crystal packing sup-1
4 motif for crystal of Ni, Co, and Zn complexes are P bcn, while it is C2/c for Cu and Mn complexes. As for the molecular configuration, the dihendral angles between the two phen planes for the complexes of Zn, Co, Ni are 87.7 (1), 85.7 (1), 86.0 (1) which are almost perpendicular to each other, but they are 46.5 (1) and 40.7 (1) for Cu and Mn complexes. According to the Jahn-teller effect theotry (if a d-orbital of a transiton metal ion is empty or full-filled and the other equivalent orbital is half full-filled, the coordinate enviorment of the transition metal ion will be distorted to form a more stable configuration), Cu 2+ and Mn 2+ have a strong tendency to Jahn-teller distortion while Zn 2+ and Ni 2+ are not. So, the local polyhedral MN 4 O 2 (M=Zn, Co, Ni) in their complexes are close to the octahedral while MN 4 O 2 (M=Mn, Cui) in their complexes are severely distorted from the octahedral. In the tiltle comound, the values of the angles subtended by the bidentate at zinc atom [77.37 (6) ] deviate significantly from the ideal vaue of 90 due to the small bite size of the fivememberbered plannar chelate rings. As shown in Fig.2, the dipole moments of [Zn(phen) 2 (C 5 O 5 )] are arranged alternatively along +b and-b directions. There are short contacts between the phen groups and the O atoms of the croconate [e.g. C(6) H(6) O(1) (x, -y, -1/2 + z) and C(11) H(11) O(3)(-1/2 + x, -1/2 + y, 3/2 - z), which probably stablize the crystal structure. S2. Experimental [K 2 (C 5 O 5 )](0.10 g) and Zn(CH 3 COO) 2.2H 2 O (0.10 g) were dissolved in solvent of water 15 ml. The mixture was heated to K under continuous stirring for 20 min. To the resulting yellow solution, an ethanol solution (10 ml) of 1,10- phenanthroline (0.1 mol/l) was added to cause an immediate precipation of yellow microcrystal. After the solutions were left to stand at room temperature for 30 minutes, they were collected by filter suction, washed with water. Then the obtained precipation and 15 ml water was placed in the teflon liner of an autoclave, which was sealed and heated to 433 K for 48 h, cooled at speed of 10 K/min, whereupon yellow block of [Zn(phen) 2 (C 5 O 5 )] were obtained. S3. Refinement All H atoms were geometrically fixed and allowed to ride on their attached atoms, which C H = 0.93 Å and U iso (H)= 1.2 U eq (C). sup-2
5 Figure 1 Molecular structure with thermal ellipsoids at 30% probability levels. [symmetry code: -x + 1/2, y, -z + 3/2] sup-3
6 Figure 2 A packing diagram of the title compound. (Croconato-κ 2 O,O )bis(1,10-phenanthroline- κ 2 N,N )zinc(ii) Crystal data [Zn(C 5 O 5 )(C 12 H 8 N 2 ) 2 ] M r = Orthorhombic, Pbcn Hall symbol: -P 2n 2ab a = (4) Å b = (3) Å c = (5) Å V = (12) Å 3 Z = 4 F(000) = 1152 D x = Mg m 3 Mo Kα radiation, λ = Å Cell parameters from 3967 reflections θ = µ = 1.11 mm 1 T = 293 K Prism, yellow mm sup-4
7 Data collection Bruker APEXII CCD area-detector diffractometer Radiation source: fine-focus sealed tube Graphite monochromator Detector resolution: 10.0 pixels mm -1 φ and ω scans Absorption correction: multi-scan (APEX2; Bruker, 2005) T min = 0.743, T max = Refinement Refinement on F 2 Least-squares matrix: full R[F 2 > 2σ(F 2 )] = wr(f 2 ) = S = reflections 179 parameters 0 restraints Primary atom site location: structure-invariant direct methods Secondary atom site location: difference Fourier map 9769 measured reflections 2627 independent reflections 2164 reflections with I > 2σ(I) R int = θ max = 27.6, θ min = 2.4 h = k = l = Hydrogen site location: inferred from neighbouring sites H-atom parameters constrained w = 1/[σ 2 (F o2 ) + (0.0414P) P] where P = (F o 2 + 2F c2 )/3 (Δ/σ) max < Δρ max = 0.29 e Å 3 Δρ min = 0.32 e Å 3 Extinction correction: SHELXL97 (Sheldrick, 2008), Fc * =kfc[ xfc 2 λ 3 /sin(2θ)] -1/4 Extinction coefficient: (5) Special details Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wr and goodness of fit S are based on F 2, conventional R-factors R are based on F, with F set to zero for negative F 2. The threshold expression of F 2 > σ(f 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 ) x y z U iso */U eq C (16) (18) (12) (4) H * C (19) (2) (13) (5) H * C (18) (18) (12) (5) H * C (16) (18) (12) (4) C (15) (16) (10) (4) C (18) (19) (12) (5) H * C (19) (19) (13) (5) H * C (16) (19) (11) (4) C (15) (16) (11) (4) sup-5
8 C (18) (2) (14) (6) H * C (19) (2) (15) (6) H * C (18) (2) (13) (5) H * C (16) (18) (11) (4) C (17) (18) (13) (5) C (3) (7) N (12) (13) (9) (3) N (13) (15) (9) (4) O (12) (13) (8) (3) O (16) (16) (11) (5) O (2) (7) Zn (3) (13) Atomic displacement parameters (Å 2 ) U 11 U 22 U 33 U 12 U 13 U 23 C (10) (11) (11) (8) (8) (8) C (11) (11) (13) (9) (10) (9) C (13) (10) (11) (9) (9) (9) C (11) (8) (10) (8) (8) (8) C (9) (9) (9) (7) (7) (7) C (13) (11) (10) (10) (9) (8) C (12) (12) (12) (10) (9) (9) C (9) (11) (11) (8) (8) (8) C (9) (9) (10) (7) (7) (7) C (11) (15) (14) (10) (10) (12) C (11) (15) (15) (11) (10) (13) C (12) (13) (12) (10) (9) (10) C (9) (10) (10) (8) (8) (8) C (11) (10) (13) (9) (9) (9) C (14) (15) (2) (13) N (8) (8) (8) (6) (6) (6) N (8) (9) (9) (7) (7) (7) O (9) (7) (8) (6) (6) (6) O (12) (10) (12) (9) (10) (9) O (16) (11) (18) (12) Zn (2) (19) (2) (12) Geometric parameters (Å, º) C1 N (2) C10 H C1 C (3) C11 C (3) C1 H C11 H C2 C (3) C12 N (3) C2 H C12 H sup-6
9 C3 C (3) C13 O (2) C3 H C13 C13 i (4) C4 C (3) C13 C (3) C4 C (3) C14 O (3) C5 N (2) C14 C (3) C5 C (3) C15 O (4) C6 C (3) C15 C14 i (3) C6 H N1 Zn (15) C7 C (3) N2 Zn (17) C7 H O1 Zn (14) C8 C (3) Zn1 O1 i (14) C8 C (3) Zn1 N1 i (15) C9 N (2) Zn1 N2 i (17) C10 C (4) N1 C1 C (19) N2 C12 H N1 C1 H C11 C12 H C2 C1 H O1 C13 C13 i (11) C3 C2 C (19) O1 C13 C (18) C3 C2 H C13 i C13 C (12) C1 C2 H O2 C14 C (2) C2 C3 C (19) O2 C14 C (2) C2 C3 H C13 C14 C (19) C4 C3 H O3 C15 C14 i (13) C3 C4 C (18) O3 C15 C (13) C3 C4 C (19) C14 i C15 C (3) C5 C4 C (18) C1 N1 C (17) N1 C5 C (17) C1 N1 Zn (13) N1 C5 C (17) C5 N1 Zn (12) C4 C5 C (17) C12 N2 C (18) C7 C6 C (19) C12 N2 Zn (15) C7 C6 H C9 N2 Zn (12) C4 C6 H C13 O1 Zn (12) C6 C7 C (19) O1 Zn1 O1 i (7) C6 C7 H O1 Zn1 N (6) C8 C7 H O1 i Zn1 N (5) C10 C8 C (2) O1 Zn1 N1 i (5) C10 C8 C (2) O1 i Zn1 N1 i (6) C9 C8 C (19) N1 Zn1 N1 i (8) N2 C9 C (18) O1 Zn1 N (6) N2 C9 C (17) O1 i Zn1 N (6) C8 C9 C (18) N1 Zn1 N (6) C11 C10 C (2) N1 i Zn1 N (6) C11 C10 H O1 Zn1 N2 i (6) C8 C10 H O1 i Zn1 N2 i (6) C10 C11 C (2) N1 Zn1 N2 i (6) C10 C11 H N1 i Zn1 N2 i (6) sup-7
10 C12 C11 H N2 Zn1 N2 i (9) N2 C12 C (2) Symmetry code: (i) x+2, y, z+3/2. Hydrogen-bond geometry (Å, º) D H A D H H A D A D H A C6 H6 O1 ii (2) 149 C11 H11 O3 iii (2) 122 Symmetry codes: (ii) x, y, z 1/2; (iii) x 1/2, y 1/2, z+3/2. sup-8
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