Smith Graham, Wermuth Urs D
Acta Crystallogr Sect E Struct Rep Online. 2010 Dec 24;67(Pt 1):m119-20. doi: 10.1107/S1600536810052694.
In polymeric title compound, {[Co(2)(C(7)H(2)N(2)O(7))(2)(H(2)O)(6)]·2H(2)O}(n), obtained from the reaction of 3,5-dinitro-salicylic acid with cobalt(II) acetate, both Co(II) atoms are located on inversion centres and exhibit a distorted octahedral coordination geometry. The coordin-ation sphere about one Co(II) atom comprises four O-atom donors from two bidentate chelate (O(phenolate) and O(carbox-yl)) and bridging dianionic ligands and two water mol-ecules [Co-O range = 2.0249 (11)-2.1386 (14) Å], while that about the second Co(II) atom has four water mol-ecules and two bridging carboxyl-ate O-donor atoms [Co-O range = 2.0690 (14)-2.1364 (11) Å]. The coordinated water mol-ecules as well as the water mol-ecules of solvation give O-H⋯O water-water and water-carboxyl hydrogen-bonding inter-actions in the three-dimensional framework structure.
在通过3,5-二硝基水杨酸与乙酸钴反应得到的聚合标题化合物{[Co₂(C₇H₂N₂O₇)₂(H₂O)₆]·2H₂O}ₙ中，两个Co(II)原子均位于对称中心上，并呈现出扭曲的八面体配位几何构型。围绕一个Co(II)原子的配位球包含来自两个双齿螯合配体（酚氧原子和羧基氧原子）和桥连双阴离子配体的四个氧原子供体以及两个水分子[Co - O键长范围 = 2.0249 (11) - 2.1386 (14) Å]，而围绕第二个Co(II)原子的配位球有四个水分子和两个桥连羧酸根氧供体原子[Co - O键长范围 = 2.0690 (14) - 2.1364 (11) Å]。配位水分子以及溶剂化水分子在三维骨架结构中形成了O - H⋯O水 - 水和水 - 羧基氢键相互作用。
