catena-Poly[[bis­(4-methyl­pyridine-κN)cobalt(II)]-di-μ-dicyanamido-κ2N1:N5]

Huang, W.; Zhang, J.; Zhang, C.

doi:10.1107/S1600536812051252

Volume 69
Part 2
Page m90
February 2013

Received 5 December 2012
Accepted 19 December 2012
Online 9 January 2013

Key indicators
Single-crystal X-ray study
T = 150 K
Mean (C-C) = 0.003 Å
R = 0.031
wR = 0.085
Data-to-parameter ratio = 13.5
Details

catena-Poly[[bis(4-methylpyridine-N)cobalt(II)]-di--dicyanamido-²N¹:N⁵]

Wenjiang Huang,^a Jinfang Zhang ^b and Chi Zhang ^a ^*

^aInstitute of Molecular Engineering and Advanced Materials, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei, Nanjing 210094, Jiangsu, People's Republic of China, and ^bInstitute of Science and Technology, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, People's Republic of China
Correspondence e-mail: chizhang@mail.njust.edu.cn

Cobalt(II) nitrate hexahydrate and sodium dicyanamide self-assembled in dimethylformamide (DMF) and 4-methylpyridine solutions to form the title compound, [Co(C₂N₃)₂(C₆H₇N)₂]_n. The Co²⁺ ion lies on an inversion center and adopts an octahedral coordination geometry in which four N atoms from four different dicyanamide ligands lie in the equatorial plane and two 4-methylpyridine N atoms occupy the axial positions. The Co^II atoms are connected by two bridging dicyanamide ligands, resulting in a chain parallel to the c axis. The chains are connected into a three-dimensional network by C-HN hydrogen bonds.

Related literature

The design and syntheses of metal-organic compounds has attracted great attention not only as a result of their intriguing architectures and topologies (Eddaoudi et al., 2001), but also because of their potential applications (Banerjee et al., 2008).

Experimental

Crystal data

[Co(C₂N₃)₂(C₆H₇N)₂]
M_r = 377.28
Monoclinic, P 2₁ /c
a = 9.3686 (19) Å
b = 13.080 (3) Å
c = 7.3048 (15) Å
= 106.86 (3)°
V = 856.7 (3) Å³
Z = 2
Mo K radiation
= 1.02 mm^-1
T = 150 K
0.21 × 0.17 × 0.15 mm

Data collection

Rigaku Saturn724+ diffractometer
Absorption correction: multi-scan (CrystalClear; Rigaku, 2008) T_min = 0.815, T_max = 1.000
4994 measured reflections
1549 independent reflections
1419 reflections with I > 2(I)
R_int = 0.016

Refinement

R[F² > 2(F²)] = 0.031
wR(F²) = 0.085
S = 1.07
1549 reflections
115 parameters
H-atom parameters constrained
_max = 0.94 e Å^-3
_min = -0.26 e Å^-3

Table 1
Hydrogen-bond geometry (Å, °)

D-HA	D-H	HA	DA	D-HA
C4-H4AN3ⁱ	0.93	2.57	3.487 (3)	168
Symmetry code: (i) -x+1, -y, -z+1.

Data collection: CrystalClear (Rigaku, 2008); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RZ5034 ).

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 50472048) and the Program for New Century Excellent Talents in Universities (NCET-05-0499).

References

Banerjee, R., Phan, A., Wang, B., Knobler, C., Furukawa, H., O'Keeffe, M. & Yaghi, O. M. (2008). Science, 319, 939-943.
Eddaoudi, M., Moler, D. B., Li, H. L., Chen, B. L., Reineke, T. M., O'Keeffe, M. & Yaghi, O. M. (2001). Acc. Chem. Res. 34, 319-330.
Rigaku (2008). CrystalClear. Rigaku Corp., Tokyo, Japan.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.

metal-organic compounds

catena-Poly[[bis(4-methylpyridine-N)cobalt(II)]-di--dicyanamido-2N1:N5]