Received 28 October 2008
aCollege of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, People's Republic of China,bDepartment of Chemistry and Chemical Engineering, Huanghuai University, Zhumadian 463000, People's Republic of China, and cCollege of Chemistry and Environmental Science, Henan Normal University, Xinxiang 453007, People's Republic of China
Correspondence e-mail: firstname.lastname@example.org
In the title compound, [Co(C7H5O3)(C14H12N2)(H2O)2]NO3·2H2O, the CoII ion is six-coordinated by two N atoms of a 2,9-dimethyl-1,10-phenanthroline (dmphen) ligand, two carboxylate O atoms of one 4-hydroxybenzoate anion and two O atoms of two water molecules, in a distorted octahedral environment; the two water molecules occupy the apical positions. In the crystal structure, the ionic units and water molecules are linked through O-HO hydrogen bonds, leading to the formation of a three-dimensional network. In addition, - interactions between a pyridine ring of the dmphen ligand and the benzene ring of the hydroxybenzoate anion [centroid-centroid separation = 3.6861 (3) Å] are observed.
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT; 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: publCIF (Westrip, 2008).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CI2703 ).
Financial support from the Science Fund of Henan Province for Distinguished Young Scholars (grant No. 07410051005) is gratefully acknowledged.
Bruker (1997). SMART, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Westrip, S. P. (2008). publCIF. In preparation.
Xuan, X. & Zhao, P. (2007a). Acta Cryst. E63, m2856.
Xuan, X. & Zhao, P. (2007b). Acta Cryst. E63, m3009.
Xuan, X.-P., Zhao, P.-Z. & Tang, Q.-H. (2007). Acta Cryst. E63, m2405.