Nucleophilic attack of carbanions on cationic platinum(II) nitrile complexes affording stable eta(1)-imine enol and eta(1)-enamine coordinated fragments

Cationic nitrile platinum(II) complexes of formula [PtMe-(RCN)(bipy)](+) un dergo nucleophilic addition of carbanions -CH(COX)(COY) (X, Y = Me, OMe), - CH(CO2Me)CN and -CH(CN)(2) to afford neutral products. According to the nat ure of the nucleophile, the organic ligand fragment displays either an imin o enol or an enamine isomeric structure. The Pt-N bond can be cleaved upon reaction with acids with formation of the corresponding beta -enaminodione.