Oxidative Addition and Adduct Formation Reaction of Carbonyl Compounds of Rhodium(I)

Department of Chemistry, Dibrugarh University, Dibrugarh-786 004

Manuscript received 9 November 1987, accepted 3 February 1988

Rhodium(I) carbonyl complexes of the type trans-[RhCl(CO)(R₂SO/R₂S)₂], where R₂SO=di-n-propyl sulphoxide (n-Pr₂SO), di-n-butyl sulphoxide (n-Bu₂SO) ; R₂S= dimethyl sulphide (Me₂S), di-isopropyl sulphide (i-Pr₂S), undergo oxidative addition reactions with small covalent molecules (YZ) forming the adducts [RhClYZ(CO)- (R₂SO/R₂S)₂], where YZ =Cl₂ Br₂ I_2, 1Cl and tetracyanoethylene (TCNE). With CH₂I, rhodium(I) compounds form a mixture of six- and five-coordinate acetyl derivatives. During oxidation, R₂SO ligands undergo isomeric rearrangement forming metal - oxygen bonded R₂SO complexes.