Abstract
An extension of prior protonolysis studies of platinum−carbon bonds to Pt−aryl bonds is reported. The protolytic stability of (dfepe)Pt(Ph)(O2CCF3) (dfepe = (C2F5)2PCH2CH2P(C2F5)2) in trifluoroacetic acid is found to be much less than (dfepe)Pt(Me)(O2CCF3), indicating that a concerted SE2 protonolysis mechanism is most likely operative in these electron-poor platinum systems. VT NMR experiments show that benzene coordination to the (dfepe)Pt2+ center in neat fluorosulfonic acid to form (dfepe)Pt(η6-C6H6)2+ at −80 °C is competitive with benzene dissociation in this weakly coordinating medium.
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