Abstract
A new vic‐dioxime ligand, namely 2‐(4,5‐bishydroxyimino‐1,3‐dithiolan‐2‐ylidene)malonic acid diethyl ester (LH2), has been synthesized in two steps starting with the condensation of carbon disulphide and malonic acid diethyl ester and subsequent reaction of the dithiolate intermediate with anti‐dichloroglyoxime (DCGO) in ethanol at 5 °C. LH2 forms mononuclear N,N′‐coordinated planar metal complexes with Ni(II) and Co(II) and N,O‐coordinated (μ‐hydroxo‐bridged dimeric complex with UO2(VI). The octahedral complex (LH)2CoPyCl has been prepared by oxidation of the (LH)2Co complex in the presence of pyridine, and it has been reduced to the Co(I) derivative by NaBH4.
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