Complexes of N-thiophosphorylthiourea tBuNHC(S)NHP(S)(OiPr)(2) with zinc(II), cadmium(II), nickel(II), and cobalt(II) cations

Reaction of the potassium salt of N-thiophosphorylthiourea tBuNHC(S)NHP(S)(OiPr)(2) (HL) with Zn-II, Cd-II, Ni-II and Co-II in aqueous EtOH leads to complexes of common formula M(L-S,S')(2) (ML2). Complexes were investigated by IR, UV-Vis, H-1 and P-31{H-1} NMR spectroscopy and microanalysis The structure of complex NiL2 was investigated by single crystal X-ray diffraction analysis. The nickel(II) ion has a squre-planar environment, S-4, with two anionic ligands involving 1,5-S,S'-coordination mode. The ligands are bound in a trans configuration.