catena-Poly[[diaqua­bis­(3-methyl­pyridine-κN)cobalt(II)]-μ-sulfato-κ2O:O′]

Alam, N.; Zeller, M.; Ahmad Tajidi, N.S.; Arifin, Z.; Mazhar, M.

doi:10.1107/S1600536811025815

Volume 67
Part 8
Pages m1065-m1066
August 2011

Received 27 April 2011
Accepted 30 June 2011
Online 9 July 2011

Key indicators
Single-crystal X-ray study
T = 100 K
Mean (C-C) = 0.002 Å
R = 0.027
wR = 0.075
Data-to-parameter ratio = 18.8
Details

catena-Poly[[diaquabis(3-methylpyridine-N)cobalt(II)]--sulfato-²O:O']

Naveed Alam,^a Matthias Zeller,^b Nur Syamimi Ahmad Tajidi,^c Zainudin Arifin ^c ^* and Muhammad Mazhar ^c

^aDepartment of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan,^bDepartment of Chemistry, Youngstown State University, 1 University Plaza, Youngstown, Ohio 44555, USA, and ^cDepartment of Chemistry, Faculty of Science, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
Correspondence e-mail: zainudin@um.edu.my

The environment of the Co^II ion in the title compound, [Co(SO₄)(C₆H₇N)₂(H₂O)₂]_n, exhibits an octahedral configuration with the two 3-methylpyridine ligands lying in cis positions with respect to each other and trans to the two coordinated water molecules. The axial positions are occupied by O atoms of the sulfate ions. Co and S atoms occupy special positions (twofold axis, Wyckoff position 4c). Neighboring Co^II ions are covalently connected with each other through the sulfate ions, thus creating infinite polymeric chains that run along the c axis. The water molecules are connected with neighboring sulfate ions through strong O-HO hydrogen bonds. Intramolecular hydrogen bonds parallel to the propagation direction of the chains stabilize the polymeric chains, and intermolecular hydrogen bonds between chains connect neighboring chains with each other, thus leading to polymeric double chains.

Related literature

For the complexation of cobalt ions by sulfate, see: Das et al. (2009); Majumder et al. (2005); Masuhara et al. (2007); Zhong et al. (2006); Zhong et al. (2011); Dietz et al. (2009); Wu et al. (2008); Carlucci et al. (2003); Ali et al. (2005); Vreshch et al. (2003).

Experimental

Crystal data

[Co(SO₄)(C₆H₇N)₂(H₂O)₂]
M_r = 377.27
Orthorhombic, P b c n
a = 15.132 (2) Å
b = 16.687 (2) Å
c = 6.4503 (9) Å
V = 1628.7 (4) Å³
Z = 4
Mo K radiation
= 1.21 mm^-1
T = 100 K
0.60 × 0.12 × 0.12 mm

Data collection

Bruker SMART APEX CCD diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2003) T_min = 0.786, T_max = 0.865
15656 measured reflections
2028 independent reflections
1892 reflections with I > 2(I)
R_int = 0.034

Refinement

R[F² > 2(F²)] = 0.027
wR(F²) = 0.075
S = 1.08
2028 reflections
108 parameters
2 restraints
H atoms treated by a mixture of independent and constrained refinement
_max = 0.57 e Å^-3
_min = -0.32 e Å^-3

Table 1
Hydrogen-bond geometry (Å, °)

D-HA	D-H	HA	DA	D-HA
O1-H1BO3ⁱ	0.82 (2)	1.86 (2)	2.6652 (15)	166 (2)
O1-H1AO3ⁱⁱ	0.84 (2)	1.92 (2)	2.7331 (14)	165 (2)
Symmetry codes: (i) $[-x+1, y, -z+{\script{1\over 2}}]$ ; (ii) -x+1, -y+1, -z+1.

Data collection: SMART (Bruker, 2002); cell refinement: SAINT-Plus (Bruker, 2003); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: Mercury (Macrae et al., 2008); software used to prepare material for publication: publCIF (Westrip, 2010).

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FI2108 ).

Acknowledgements

This project was financed by the University of Malaya, UMRG grant: RG097/10AET. The X-ray diffractometer was funded by NSF Grant 0087210, Ohio Board of Regents Grant CAP-491, and Youngstown State University.

References

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