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Synthesis, Crystal Structure and Properties of Novel Zinc(II) and Cobalt(II) Chain Complexes with 3,5-dimethylpyrazole and Thiocyanate

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This paper presents the synthesis, crystal structure and properties of new zinc(II) and cobalt(II) 1-D chain complexes with 3,5-dimethylpyrazole and thiocyanate, [M(pz*)2(NCS)2]·H2O (M=Zn, Co; pz*=3,5-dimethylpyrazole). The structures of both complexes were determined by X-ray diffraction methods and showed very similar crystallographic character. The M(II) ion in each complex is coordinated to two pyrazole nitrogen atoms and two nitrogen atoms of NCS to form a distorted tetrahedron. In the cell of each complex are four complex molecules and four H2O molecules. Adjacent complex molecules are connected by hydrogen bonds to form 1-D chain. Each sulfur atom in the complex is connected by a weak coordination bond with an M(II) ion of an adjacent chain to form a sawtooth-type double 1-D chain structure. The bond distances Zn-S and Co-S are 3.919 Å and 3.853 Å, respectively.
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Keywords: 1-D complexes; Carbonic anhydrase; Cobalt(II) complex; Inhibitor; Thiocyanate; Zinc(II) complex

Document Type: Research Article

Affiliations: Department of Chemistry, Nankai University, Tianjin, 300071, P. R. of China

Publication date: January 1, 2002

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