Hökelek Tuncer, Yılmaz Filiz, Tercan Barış, Aybirdi Ozgür, Necefoğlu Hacali
Acta Crystallogr Sect E Struct Rep Online. 2009 Oct 10;65(Pt 11):m1328-9. doi: 10.1107/S1600536809040409.
The title mol-ecule, [Zn(2)(C(8)H(8)NO(2))(4)(C(10)H(14)N(2)O)(2)]·2H(2)O, is a centrosymmetric binuclear complex, with two Zn(II) ions [Zn⋯Zn' = 2.9301 (4) Å] bridged by four methyl-amino-benzoate (MAB) ligands. The four nearest O atoms around each Zn(II) ion form a distorted square-planar arrangement with the distorted square-pyramidal coordination completed by the pyridine N atom of the N,N-diethyl-nicotinamide (DENA) ligand. Each Zn(II) ion is displaced by 0.3519 (2) Å from the plane of the four O atoms, with an average Zn-O distance of 2.030 Å. The dihedral angles between carboxyl-ate groups and adjacent benzene rings are 10.57 (10) and 16.63 (12)°, while the benzene rings are oriented at a dihedral angle of 81.84 (5)°. The pyridine ring is oriented at dihedral angles of 40.49 (6) and 51.25 (6)° with respect to the benzene rings. In the crystal structure, inter-molecular O-H⋯O and N-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. The π-π contact between the inversion-related pyridine rings [centroid-centroid distance = 3.633 (1) Å] may further stabilize the crystal structure.
标题分子[Zn₂(C₈H₈NO₂)₄(C₁₀H₁₄N₂O)₂]·2H₂O是一个中心对称的双核配合物，两个Zn(II)离子[Zn⋯Zn′ = 2.9301(4) Å]由四个甲基氨基苯甲酸酯(MAB)配体桥联。每个Zn(II)离子周围的四个最近邻O原子形成一个扭曲的平面正方形排列，由N,N -二乙基烟酰胺(DENA)配体的吡啶N原子完成扭曲的四方锥配位。每个Zn(II)离子相对于四个O原子的平面位移0.3519(2) Å，平均Zn - O距离为2.030 Å。羧酸根基团与相邻苯环之间的二面角为10.57(10)°和16.63(12)°，而苯环之间的二面角为81.84(5)°。吡啶环相对于苯环的二面角为40.49(6)°和51.25(6)°。在晶体结构中，分子间的O - H⋯O和N - H⋯O氢键将分子连接成三维网络。反演相关吡啶环之间π - π接触[质心 - 质心距离 = 3.633(1) Å]可能进一步稳定晶体结构。
