Moody Lamaryet, Balof Shawna, Smith Shanika, Rambaran Varma H, Vanderveer Don, Holder Alvin A
Acta Crystallogr Sect E Struct Rep Online. 2007 Dec 21;64(Pt 1):m262-3. doi: 10.1107/S1600536807067141.
The title compound, [Co(3)Na(2)(C(7)H(2)ClNO(4))(4)(H(2)O)(12)]Co(C(7)H(2)ClNO(4))(H(2)O)(3)·6H(2)O, consists of a centrosymmetric dimer of Co(II)(dipicCl)(2) complex dianions [dipicCl is 4-chloro-pyridine-2,6-dicarboxyl-ate] bridged by an Na(2)Co(II)(H(2)O)(12) tetra-cationic cluster, two independent [Co(dipicCl)(H(2)O)(3)] complexes, and six water mol-ecules of crystallization. The metals are all six-coordinate with distorted octahedral geometries. The [Co(II)(dipicCl)(H(2)O)(3)] complexes are neutral, with one tridentate ligand and three water molecules. The Co(II)(dipicCl)(2) complexes each have two tridentate ligands. The Na(2)Co(II)(H(2)O)(12) cluster has a central Co(II) ion which is coordinated to six water molecules and lies on a crystallographic inversion center. Four of the water molecules bridge to two sodium ions, each of which have three other water molecules coordinated along with an O atom from the Co(II)(dipicCl)(2) complex. In the crystal structure, the various units are linked by O-H⋯O hydrogen bonds, forming a three-dimensional network. Two water molecules are disordered equally over two positions.
标题化合物[Co₃Na₂(C₇H₂ClNO₄)₄(H₂O)₁₂][Co(C₇H₂ClNO₄)(H₂O)₃]₂·6H₂O由中心对称的[Co(II)(dipicCl)₂]²⁻络合二价阴离子二聚体（dipicCl为4-氯吡啶-2,6-二羧酸根）、由[Na₂Co(II)(H₂O)₁₂]⁴⁺四核阳离子簇桥连而成，包含两个独立的[Co(dipicCl)(H₂O)₃]络合物以及六个结晶水分子。金属均为六配位，具有扭曲的八面体几何构型。[Co(II)(dipicCl)(H₂O)₃]络合物呈中性，有一个三齿配体和三个水分子。[Co(II)(dipicCl)₂]²⁻络合物各有两个三齿配体。[Na₂Co(II)(H₂O)₁₂]⁴⁺簇有一个位于晶体学倒转中心的中心Co(II)离子，它与六个水分子配位。其中四个水分子桥连到两个钠离子上，每个钠离子还与另外三个水分子以及来自[Co(II)(dipicCl)₂]²⁻络合物的一个O原子配位。在晶体结构中，各个单元通过O—H⋯O氢键相连，形成三维网络。有两个水分子在两个位置上无序分布且占有率相等。
