Hökelek Tuncer, Dal Hakan, Tercan Barış, Ozbek F Elif, Necefoğlu Hacali
Acta Crystallogr Sect E Struct Rep Online. 2009 Apr 22;65(Pt 5):m545-6. doi: 10.1107/S1600536809014226.
In the monomeric and centrosymmetric title Ni(II) complex, [Ni(C(7)H(4)ClO(2))(2)(C(10)H(14)N(2)O)(2)(H(2)O)(2)], the Ni(II) ion is located on an inversion center. The asymmetric unit contains one 2-chloro-benzoate ligand, one diethyl-nicotinamide (DENA) ligand and one coordinating water mol-ecule, the ligands being monodentate. The four O atoms in the equatorial plane around the Ni(II) ion form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by two N atoms of the DENA ligands in axial positions. The dihedral angle between the benzene ring and the attached carboxyl-ate group is 87.36 (10)°, while the pyridine and benzene rings are oriented at an angle of 41.90 (5)°. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into a two-dimensional network parallel to (10).
在单体且具有中心对称性的标题镍（II）配合物[Ni(C₇H₄ClO₂)₂(C₁₀H₁₄N₂O)₂(H₂O)₂]中，镍（II）离子位于一个对称中心上。不对称单元包含一个2-氯苯甲酸酯配体、一个二乙烟酰胺（DENA）配体和一个配位水分子，这些配体均为单齿配体。镍（II）离子周围赤道平面上的四个氧原子形成略微扭曲的平面正方形排列，而轴向位置的DENA配体的两个氮原子则使这种略微扭曲的八面体配位得以完整。苯环与相连的羧酸根基团之间的二面角为87.36（10）°，而吡啶环和苯环的取向角度为41.90（5）°。在晶体结构中，分子间的O—H⋯O氢键将分子连接成平行于（10）的二维网络。
