Reactions of the unsaturated anion [Re3H4(CO)10]- with carboxylic acids and x-ray characterization of the anions [Re3H3(CO)10(\u3bc-O2CR)]- (R = H, CF3)

The novel anions [Re3H3(CO)10(\u3bc-O2CR)]- (R = H, CH3, CF3), obtained by reaction of [Re3H4(CO)10]- with the corresponding carboxylic acids, have been characterized by IR and NMR spectra and by X-ray analysis of the formate and trifluoroacetate derivatives. They contain a triangle of rhenium atoms, with the carboxylate group diaxially bridging on the shorter ReRe edge. \ua9 1982