Synthesis and X-ray crystal structures of bis(3-hydroxy-4-methyl-2(3H)-thiazolethiolato-S2,O)bis(dimethylsulfoxide-O)M, M = cobalt(II) and nickel(II)

Crystallisation of the divalent nickel and cobalt complexes of 3-hydroxy-4-methyl-2(3H)-thiazolethione (HMTT) from DMSO yields isostructural chelate complexes M(MTT)2(dmso)2, M = CoII/NiII. The metal atom adopts distorted octahedral coordination via two bidentate MTT ligands arranged in a trans-conformation and two DMSO molecules coordinated through oxygen. Powder X-ray diffraction (PXRD) and energy-dispersive X-ray (EDX) analysis show that the materials form a continuous solid solution CoxNi1−x(MTT)2(dmso)2 over the entire composition range 0 ≤ x ≤ 1.