FORMATION OF A RHENIUM(III) CARBONYL COMPLEX BY ELECTROPHILIC ATTACK ON RHENIUM ISOCYANIDES - SYNTHESIS AND MOLECULAR-STRUCTURE OF (RE[N(CH2CH2S)(3)][CNC(CH3)(3)]) AND (RE[N(CH2CH2S)(3)](CO))

Treatment of the trigonal-bipyramidal complex {Re[N(CH2CH2S)(3)](CNCH(2)COOEt)} (1a) with LiOH in THF leads to ester hydrolysis and yields the complex {Re[N(CH2CH2S)(3)](CNCH2COOH)} (2). Attempts to hydrolyze the ester in 1a in the two-phase system toluene/concentrated hydrochloric acid proceeded under electrophilic attack at the isocyanide nitrogen atom and formation of the carbonyl complex {Re[N(CH2CH2S)(3)](CO)} (3). Complex 3 was also obtained by treatment of {Re[N(CH2CH2S)(3)][CNC(CH3)(3)]} (1b) with toluene/hydrochloric acid. The molecular structures of 1b and 3 were established by X-ray structure analysis.