Wang Wenguo, Barea Elisa, Linares Fátima
Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva s/n, 18071 Granada, Spain.
Acta Crystallogr Sect E Struct Rep Online. 2009 Dec 19;66(Pt 1):m86-7. doi: 10.1107/S1600536809053896.
The two independent Mn(II) ions in the polymeric title compound, {[Mn(2)(C(6)H(2)N(2)O(4))(C(10)H(8)N(2))(H(2)O)(6)]SO(4)·3H(2)O}, exhibit distorted MnN(2)O(4) octa-hedral coordination geometries, with the pyrimidine-4,6-dicarboxyl-ate (pmdc) ligand acting in the bis-chelating μ-(κO,κN:κO',κN') bridging mode and the 4,4'-bipyridine (bpy) ligand in the μ-(κN:κN') bridging mode. The remaining coordination sites are occupied by O atoms of water mol-ecules. As a consequence, cationic chains of Mn(2)(μ-pmdc)(μ-4,4'-bpy)(H(2)O)(6) are generated, which extend approximately along the a axis. Sulfate counter-anions and three uncoordinated water mol-ecules complete the structure, which is stabilized by multiple O-H⋯O hydrogen-bonding inter-actions between the structural units.
在标题聚合物化合物{[Mn₂(C₆H₂N₂O₄)(C₁₀H₈N₂)(H₂O)₆]SO₄·3H₂O}中，两个独立的Mn(II)离子呈现出扭曲的MnN₂O₄八面体配位几何构型，嘧啶-4,6-二羧酸酯（pmdc）配体以双螯合μ-(κO,κN:κO',κN')桥联模式起作用，4,4'-联吡啶（bpy）配体以μ-(κN:κN')桥联模式起作用。其余配位位点被水分子的O原子占据。因此，生成了[Mn₂(μ-pmdc)(μ-4,4'-bpy)(H₂O)₆]²⁺阳离子链，其大致沿a轴延伸。硫酸根抗衡阴离子和三个未配位的水分子完善了该结构，该结构通过结构单元之间的多个O-H⋯O氢键相互作用得以稳定。
