Poly[bis­(μ-2,6-dimethyl­pyridinium-3,5-dicarboxyl­ato-κ2O3:O5)copper(II)]

Zhang, H.-K.; Du, Y.-H.; Jiang, T.; Li, B.-Y.; Hou, G.-F.

doi:10.1107/S1600536808035873

Volume 64
Part 12
Page m1510
December 2008

Received 31 October 2008
Accepted 1 November 2008
Online 8 November 2008

Key indicators
Single-crystal X-ray study
T = 291 K
Mean (C-C) = 0.003 Å
R = 0.033
wR = 0.092
Data-to-parameter ratio = 15.2
Details

Poly[bis(-2,6-dimethylpyridinium-3,5-dicarboxylato-²O³:O⁵)copper(II)]

Hong-Kun Zhang,^a ^* Yu-Hong Du,^a Tao Jiang,^a Bai-Yan Li ^b and Guang-Feng Hou ^b

^aDepartment of Food and Environmental Engineering, Heilongjiang East College, Harbin 150086, People's Republic of China, and ^bCollege of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, People's Republic of China
Correspondence e-mail: zhanghongkun2000@163.com

In the title coordination polymer, [Cu(C₉H₈NO₄)₂]_n, the Cu atom, located on a twofold rotation axis, is four coordinate in a distorted square-planar environment. Each 2,6-dimethylpyridinium-3,5-dicarboxylate anion bridges two Cu atoms, forming a two-dimensional coordination polymer. A three-dimensional supramolecular network is built from N-HO hydrogen bonds involving the pyridinium NH and the carboxyl COO groups.

Related literature

For the synthesis of 2,6-dimethylpyridine-3,5-dicarboxylic acid, see: Checchi et al. (1959). For the crystal structures of some of its metal complexes, see: Gao et al. (2007); Shi et al. (2007); Zeng et al. (2000, 2002).

Experimental

Crystal data

[Cu(C₉H₈N₂O₄)₂]
M_r = 451.87
Orthorhombic, P b c n
a = 8.2003 (16) Å
b = 16.234 (3) Å
c = 13.708 (3) Å
V = 1824.9 (6) Å³
Z = 4
Mo K radiation
= 1.25 mm^-1
T = 291 (2) K
0.26 × 0.24 × 0.19 mm

Data collection

Rigaku R-AXIS RAPID diffractometer
Absorption correction: multi-scan (ABSCOR; Higashi, 1995) T_min = 0.733, T_max = 0.801
16747 measured reflections
2097 independent reflections
1754 reflections with I > 2(I)
R_int = 0.051

Refinement

R[F² > 2(F²)] = 0.033
wR(F²) = 0.092
S = 1.09
2097 reflections
138 parameters
H atoms treated by a mixture of independent and constrained refinement
_max = 0.41 e Å^-3
_min = -0.29 e Å^-3

Table 1
Hydrogen-bond geometry (Å, °)

D-HA	D-H	HA	DA	D-HA
N1-H8O3ⁱ	0.82 (3)	1.88 (3)	2.698 (2)	177 (3)
Symmetry code: (i) $[x, -y+1, z+{\script{1\over 2}}]$ .

Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG2511 ).

Acknowledgements

The authors thank the Project of the Science and Technology Foundation of Heilongjiang Provincial Education Department (grant No. 11523041) and Heilongjiang East College for supporting this study.

References

Checchi, S. (1959). Gazz. Chim. Ital. 89, 2151-2162.
Gao, J.-S., Zhang, Y.-M., Li, B.-Y. & Hou, G.-F. (2007). Acta Cryst. E63, m2717.
Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan.
Rigaku (1998). RAPID-AUTO. Rigaku Corporation, Tokyo, Japan.
Rigaku/MSC (2002). CrystalStructure. Rigaku/MSC Inc., The Woodlands, Texas, USA.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Shi, A.-E., Li, B.-Y., Hou, G.-F. & Gao, J.-S. (2007). Acta Cryst. E63, m471-m473.
Zeng, Q.-Q., Jennings, M. C., Puddephatt, R. J. & Muir, K. W. (2000). CrystEngComm, 2, 73-76.
Zeng, Q.-Q., Jennings, M. C., Puddephatt, R. J. & Muir, K. W. (2002). Inorg. Chem. 41, 5174-5186.

metal-organic compounds

Poly[bis(-2,6-dimethylpyridinium-3,5-dicarboxylato-2O3:O5)copper(II)]