Synthesis and characterization of the "sulfur-rich" bis(perthiobenzoato)(dithiobenzoato)technetium(III) heterocomplex

Mevellec F; Tisato F; Refosco F; Roucoux A; Noiret N; Patin H; Bandoli G

Inorganic Chemistry, Vol.41, No.3, 598-601, 2002

Mevellec F, Tisato F, Refosco F, Roucoux A, Noiret N, Patin H, Bandoli G

Formation of the mixed bis(perthiobenzoato)dithiobenzoato-Tc(III) heterocomplex [Tc-99(S3CPh)(2)(S2CPh)] (1) is achieved via reduction - substitution reactions of excess dithiobenzoate piperidinium salt with labile high-valent [Tc(O)Cl-4](-) or [Tc(N)Cl-4](-) precursors. Partial oxidation of the ligand affords a coordination sphere that is totally filled by sulfur donor atoms of different nature. Hence, the combination of pi-donor and pi-acceptor sulfurs produces a peculiar distorted octahedral environment characterized by the substitution-inert metal fragment [Tc(S-3-CPh)(2)] the substitution-labile dithiobenzato coligand.