Spectroscopic investigation and density functional theory calculations of mercaptobenzothiazole and mercaptobenzimidazole ligands and their rhenium complexes

Four complexes containing the [Re(V)O]3+ core have been prepared by substitution on the precursors RO(citrate)2 – and ReO(gluconate)2 –. The complex [ReO(MBT)2OH] was obtained by reaction of the direct reduction of ReO4 – using sodium borohydride as a reducing agent. Four complexes were characterized by UV-Vis and IR spectrophotometer, elemental analyses, 1H-and 13C NMR spectroscopy, TG and DFT calculation