The oxidative addition reaction of alkylvinyl triflates with (Ph3P)4Pt and (Ph3P)2Pt(C2H4) was investigated as a prototypical example of the first step of the Ni triad metal mediated vinylic cross coupling reactions. Kinetic, stereochemical, and variable temperature NMR experiments were carried out to establish the involvement of -alkene complexes in these reactions. The proposed mechanism involves rate-determining formation of a -alkene Pt complex, followed by rapid rearrangement paper in this issue.
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