Alkoxide attack at carbonyl and hydrosulphide attack at isocyanide in the mixed carbonyl-isocyanide cation [OsCl(CO) 2(CNR)(PPh 3) 2] +. A new synthesis of π-bound isothiocyanate (RNCS) complexes

Abstract

[OsCl(CO) 2(CNR)(PPh 3) 2] + (R = p-tolyl) reacts with OMe − to give OsCl(CO 2Me)(CO)(CNR)(PPh 3) 2 but reaction with SH − produces the π-bound p-tolylisothiocyanate complex, Os(η 2-SCNR)(CO) 2(PPh 3) 2, which can be protonated or methylated at N to yield complexes containing bidentate thiocarboxamido-ligands.