Hökelek Tuncer, Yılmaz Filiz, Tercan Barış, Ozbek F Elif, Necefoğlu Hacali
Acta Crystallogr Sect E Struct Rep Online. 2009 Jun 13;65(Pt 7):m766-7. doi: 10.1107/S1600536809021795.
In the monomeric centrosymmetric title Ni(II) complex, [Ni(C(7)H(4)BrO(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-bromo-benzoate ligand, one diethyl-nicotinamide (DENA) ligand and one coordinated water mol-ecule. 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 two DENA ligands in the axial positions. The dihedral angle between the benzene ring and the attached carboxyl-ate group is 87.73 (15)°, while the pyridine and benzene rings are oriented at a dihedral angle of 42.48 (7)°. In the crystal structure, O-H⋯O hydrogen bonds link the mol-ecules into a two-dimensional network parallel to (10). In addition, C-H⋯O hydrogen bonds are observed.
在单体中心对称的标题镍（II）配合物[Ni(C₇H₄BrO₂)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-溴苯甲酸酯配体、一个二乙基烟酰胺（DENA）配体和一个配位水分子。镍（II）离子周围赤道平面上的四个O原子形成一个稍有畸变的平面正方形排列，而轴向位置上两个DENA配体的两个N原子则使配位形成稍有畸变的八面体。苯环与相连的羧酸根之间的二面角为87.73 (15)°，而吡啶环与苯环的二面角为42.48 (7)°。在晶体结构中，O—H⋯O氢键将分子连接成平行于(10)的二维网络。此外，还观察到C—H⋯O氢键。
