By dropwise adding thio ligands to concentrated aqueous solutions of Cd(ClO4)2·6H2O ,polymeric complexes,Cd(Ⅱ）O,O′-dipropyldithiophosphate(1),O,O′-dibutyl-dithiophosphate(2),O,O′-diisopropyl-dithiophosphate(3) and O,O′-diisobutyl-dithiophos phate(4) were obtained.The structure of 4 was determined by Xray diffraction analysis,showing that the metal ion sits in distorted tetrahedral sulphur coordination sphere and that the eight-memberd bimetallic rings take the twist chair and boat conformations, alternately.Based on facts that the S(1)-Cd Bond length [0.25099(12)nm] is shorter than the other S-Cd bond length [0.25399(12)-0.25701(18)nm] and that the S(1)-involving angles [113.45(4)°-118.43(5)°] are systematically large than the normal angles of a tetrahedron,the ligands are hypothesized to be erratically functionalized to Cd(Ⅱ）.To certify the steric nonequivalence of ligands,the compounds were investigated by solid 13C,31P and 113Cd NMR spectroscopy.
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