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Platinum promoted insertion of an alkyne into a metal-hydrogen bond
Richard D Adams1, Burjor Captain, Lei Zhu
1Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. adams@mail.chem.sc.edu
Abstract:
HOs(CO)4SnPh3, 1 reacts with PhC2H in the presence to Pt(PBut3)2 to yield the alkyne insertion product PtOs(CO)4(SnPh3)(PBut3)[mu-HC2(H)Ph], 2 containing a Pt(PBut3)(CO) group coordinated to the osmium atom and the alkenyl ligand. In the absence of PhC2H, 1 reacts with Pt(PBut3)2 to form a Pt(PBut3) adduct, PtOs(CO)4(SnPh3)(PBut3)(mu-H), 3 at the Os-H bond. This adduct is readily transformed to 2 upon reaction with PhC2H. In the absence of the Pt(PBut3) promoter, PhC2H does not react with 1.
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