Received 22 May 2008
In the title dinuclear complex, [Ni2(C8H7O2)4(C12H8N2)2(H2O)], each NiII atom is six-coordinated by three carboxylate O atoms from three 4-methylbenzoate ligands, two N atoms from two 1,10-phenanthroline ligands, and one 2-bridging aqua ligand. The dimeric complex is located on a crystallographic twofold axis and each Ni atom displays a distorted octahedral coordination geometry. The crystal structure is stabilized via intramolecular hydrogen bonding of the bridging water molecule and the uncoordinated carboxylate O atoms, and by C-HO and - stacking interactions [centroid-centroid distances between neighbouring phenanthroline ring systems and between the benzene ring of a 4-methylbenzoate unit and a phenanthroline ring system are 3.662 (2) and 3.611 (3) Å, respectively].
For the coordination chemistry of 4-methylbenzoate complexes see: Song et al. (2007); Li et al. (2003, 2004); Geetha et al. (1999). For related complexes, see: Eremenko et al. (1999); Sung et al. (2000); Novak et al. (2005).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL; software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZL2119 ).
The authors thank Guang Dong Ocean University for supporting this study.
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