A triclinic polymorph of catena-poly[[bis­(N,N-dimethyl­formamide-κO)cobalt(II)]-di-μ-1,5-dicyanamido-κ4N1:N5]

Meng, S.C.

doi:10.1107/S1600536812043310

Volume 68
Part 11
Page m1404
November 2012

Received 10 October 2012
Accepted 18 October 2012
Online 24 October 2012

Key indicators
Single-crystal X-ray study
T = 150 K
Mean (N-C) = 0.003 Å
R = 0.025
wR = 0.061
Data-to-parameter ratio = 13.6
Details

A triclinic polymorph of catena-poly[[bis(N,N-dimethylformamide-O)cobalt(II)]-di--1,5-dicyanamido-⁴N¹:N⁵]

S. C. Meng ^a ^*

^aSchool of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
Correspondence e-mail: mengsc@ujs.edu.cn

The title compound, [Co(C₂N₃)₂(C₃H₇NO)₂]_n, is a triclinic polymorph of the previously reported monoclinic structure [Tong et al. (2003). Acta Cryst. E59, m405-m407]. The Co^II ion lies on an inversion centre and adopts an almost regular octahedral N₄O₂ coordination geometry. Adjacent Co^II atoms are connected by two bridging dicyanamide ligands, resulting in the formation of neutral chains parallel to the b axis. The title complex is isotypic with the Mn^II analogue but not with the Ni^II analogue.

Related literature

For the design and synthesis of metal-organic compounds, see: Long & Yaghi (2009). For the structures of the Mn^II and Ni^II analogues, see: Batten et al. (1999); Shen & Yuan (2005). For the structure of the monoclinic polymorph, see: Tong et al. (2003).

Experimental

Crystal data

[Co(C₂N₃)₂(C₃H₇NO)₂]
M_r = 337.22
Triclinic, $[P \overline 1]$
a = 6.4315 (13) Å
b = 7.3879 (15) Å
c = 8.6210 (17) Å
= 105.69 (3)°
= 107.94 (3)°
= 96.19 (3)°
V = 366.93 (17) Å³
Z = 1
Mo K radiation
= 1.19 mm^-1
T = 150 K
0.22 × 0.18 × 0.15 mm

Data collection

Rigaku Saturn724+ diffractometer
Absorption correction: multi-scan (CrystalClear; Rigaku, 2008) T_min = 0.845, T_max = 1.000
2514 measured reflections
1319 independent reflections
1242 reflections with I > 2(I)
R_int = 0.015

Refinement

R[F² > 2(F²)] = 0.025
wR(F²) = 0.061
S = 1.04
1319 reflections
97 parameters
H-atom parameters constrained
_max = 0.22 e Å^-3
_min = -0.24 e Å^-3

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: RZ5015 ).

Acknowledgements

This work was supported by the Foundation of Jiangsu University (08JDG037).

References

Batten, S. R., Jensen, P., Kepert, C. J., Kurmoo, M., Moubaraki, B., Murray, K. S. & Price, D. J. (1999). J. Chem. Soc. Dalton Trans. pp. 2987-2997
Long, J. R. & Yaghi, O. M. (2009). Chem. Soc. Rev. 38, 1213-1214.
Rigaku (2008). CrystalClear. Rigaku Corporation, Tokyo, Japan.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Shen, X.-P. & Yuan, A.-H. (2005). Acta Cryst. E61, m1937-m1939.
Tong, M.-L., Zhou, A.-J., Hu, S., Chen, X.-M. & Ng, S. W. (2003). Acta Cryst. E59, m405-m407.

metal-organic compounds

A triclinic polymorph of catena-poly[[bis(N,N-dimethylformamide-O)cobalt(II)]-di--1,5-dicyanamido-4N1:N5]