Acta Cryst. (2008). E64, m1591-m1592  [ doi:10.1107/S1600536808038117 ]

Diaqua(2,9-dimethyl-1,10-phenanthroline-²N,N')(4-hydroxybenzoato-²O,O')cobalt(II) nitrate dihydrate

C. Zhai, F. Yan and P. Zhao

Abstract: In the title compound, [Co(C₇H₅O₃)(C₁₄H₁₂N₂)(H₂O)₂]NO₃·2H₂O, the Co^II 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.

Online 22 November 2008

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