Eshtiagh-Hosseini H, Mirzaei M, Mousavinezhad A, Necas M, Mague J T
Acta Crystallogr Sect E Struct Rep Online. 2012 Jan;68(Pt 1):m71-2. doi: 10.1107/S1600536811053566. Epub 2011 Dec 21.
In the binuclear centrosymmetric title compound, [In(2)(C(7)H(3)NO(4))(2)(C(7)H(4)NO(4))(2)(H(2)O)(2)]·4H(2)O, which contains both pyridine-2,3-dicarboxyl-ate and 3-carb-oxy-pyridine-2-carboxyl-ate ligands, the In(III) atom is six-coordinated in a distorted octa-hedral geometry. One pyridine ligand is N,O-chelated while the other is N,O-chelated and at the same time bridging to the other via the second carboxyl group. In the crystal, an extensive O-H⋯O hydrogen-bonding network, involving the coordinated and lattice water mol-ecules and the carboxyl groups of the ligands, together with C-H⋯O and π-π inter-actions [centroid-centroid distance = 3.793 (1) Å], leads to the formation of a three-dimensional structure.
在双核中心对称的标题化合物[In₂(C₇H₃NO₄)₂(C₇H₄NO₄)₂(H₂O)₂]·4H₂O中，它同时含有吡啶 - 2,3 - 二羧酸酯和3 - 羧基吡啶 - 2 - 羧酸酯配体，In(III)原子以扭曲的八面体几何构型进行六配位。一个吡啶配体是N,O - 螯合的，而另一个是N,O - 螯合的，同时通过第二个羧基与另一个相连。在晶体中，广泛的O - H⋯O氢键网络，涉及配位水分子和晶格水分子以及配体的羧基，连同C - H⋯O和π - π相互作用[质心 - 质心距离 = 3.793 (1) Å]，导致形成三维结构。
