Aydın Omür, Caylak Delibaş Nagihan, Necefoğlu Hacali, Hökelek Tuncer
Acta Crystallogr Sect E Struct Rep Online. 2012 Apr 1;68(Pt 4):m521-2. doi: 10.1107/S160053681201330X. Epub 2012 Mar 31.
In the title complex, [Co(C(7)H(4)IO(2))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)], the Co(II) cation is located on an inversion center and is coordinated by two monodentate 2-iodo-benzoate (IB) anions, two nicotin-amide (NA) ligands and two water mol-ecules. The four O atoms in the equatorial plane around the Co(II) cation form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl-ate group and the adjacent benzene ring is 22.3 (3)°, while the pyridine ring and the benzene ring are oriented at a dihedral angle of 84.59 (13)°. Intra-molecular O-H⋯O hydrogen bonding occurs between the carboxyl-ate group and coordinated water mol-ecule. In the crystal, N-H⋯O, O-H⋯O and weak C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional supra-molecular network.
在标题配合物[Co(C₇H₄IO₂)₂(C₆H₆N₂O)₂(H₂O)₂]中，Co(II)阳离子位于一个对称中心上，由两个单齿的2-碘苯甲酸根（IB）阴离子、两个烟酰胺（NA）配体和两个水分子配位。Co(II)阳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NA配体的两个N原子则使配位形成稍有畸变的八面体结构。羧酸根基团与相邻苯环之间的二面角为22.3 (3)°，吡啶环和苯环之间的二面角为84.59 (13)°。羧酸根基团与配位水分子之间存在分子内O—H⋯O氢键。在晶体中，N—H⋯O、O—H⋯O和弱C—H⋯O氢键将分子连接成三维超分子网络。
