4,6-Dimethylpyrimidine-2-thionato (dmpymt–) complexes of nickel(II) and cadmium(II). Crystal structure of [Cd(dmpymt)2]: a compound with a calixarene-like structure
Abstract
Nickel and cadmium complexes of the anionic form of 4, 6-dimethylpyrimidine-2-thione (Hdmpymt) and their adducts with neutral ligands (1,10-phenanthroline or 2,2′-bipyridine) have been prepared by an electrochemical procedure and characterized by spectroscopic (IR, UV, 1H and 13C NMR) methods, and for the [{Cd(dmpymt)2}6] complex by X-ray crystallographic techniques. This compound is hexanuclear with an array of six cadmium atoms bridged by twelve sulfur atoms. Each cadmium atom has a distorted-octahedral cis-CdS4N2 environment with each ligand acting in a N,S bidentate S-bridging mode. The hexamer has a calixarene-like structure with cavities large enough to accommodate molecules such as acetonitrile, carbon monoxide and molecular iodine.
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