Novel cyclobutadiene–platinum(II) and alkoxy-carbene–platinum(IV) cations

Abstract
The novel tetramethylcyclobutadiene complex [PtCF3(C4Me4)(PMe2Ph)2]+[PF6] and the first platinum(IV)–alkoxy-carbene complex [PtMe2(CF3)-([graphic omitted]H2)(PMe2Ph)2]+[PF6] have been prepared from cationic acetylenic intermediates.