Formation of 5-phenyl-1,2-dithiole-3-thione from molybdenum dithiopropiolato complexes

摘要

Molybdenum dithiopropiolato complexes, [(eta(5)-C5R4R')Mo(CO)(2)(eta(2)-S(2)CCequivalent toCPh)] (R=H, R'=Me 1a, R=R'=H 1b; R = R= Me 1c) react with trimethylamine-N-oxide (TMNO . 2H(2)O) under mild thermolysis to form 5-phenyl-1,2-dithiole-3-thione (2). The reaction proceeds through the formation of the oxo-complexes, [(eta(5)-C5R4R')MO(O)(eta(3)-S(2)CCequivalent toCPh)] (R = H, R'= Me 3a, R = R'= H 3b; R = R'= Me 3c). Direct reaction of 3a-c with TMNO.2H(2)O under thermolysis also results in formation of 2. (C) 2004 Elsevier B.V. All rights reserved. [References: 15]