119109-35-2Relevant academic research and scientific papers
Interaction of (Ph3P)4Pt with alkynylvinyl triflates: Stereochemistry and mechanism of formation of σ-enynyl and σ-butatrienyl cationic platinum(II) complexes
Stang, Peter J.,Datta, Arun K.
, p. 1024 - 1029 (2008/10/08)
Reaction of alkynylvinyl triflates with (Ph3P)4Pt results in σ-enynyl or σ-butatrienyl cationic platinum(II) complexes as reasonably stable microcrystalline solids in 63-84% isolated yields. Only hindered triflates give σ-butatrienyl complexes. Stereochemical studies established that a multistep process, involving initial π-acetylene formation, subsequent rearrangement to a σ-butatrienyl complex and attack by a second Pt species, to give the final σ-enynyl complexes best accounts for the observed results. Formation of the σ-butatrienyl complexes occurs stereospecifically with inverted olefin geometry whereas the formation of the enyne complexes occurs with partial stereoconvergence. These results are discussed and compared to the related reactions of iridium.
