The reaction of carbon monoxide with platinum ylids

Abstract The platinum(II) ylids [X 2 Pt{CH(py)CH 2 CH 3 }(py)] (X = Cl, Br; py = pyridine) react with carbon monoxide to give the platinum carbonyls [CO(X 2 )Pt{CH(py)CH 2 CH 2 CH 3 }] which lose CO on heating or in solution. The platinum(IV) ylids [Cl 4 Pt{CH(py)CH 2 CH 3 }(py)] and[Cl 2 I(CH 3 )Pt{CH(py)CH 2 CH 3 }(py)] also react with CO to give Pt(CO)-ylid compounds.