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An extension of prior protonolysis studies of platinum−carbon bonds to Pt−aryl bonds is reported. The protolytic stability of (dfepe)Pt(Ph)(O 2 CCF 3 ) (dfepe = (C 2 F 5 ) 2 PCH 2 CH 2 P(C 2 F 5 ) 2 ) in trifluoroacetic acid is found to be much less than (dfepe)Pt(Me)(O 2 CCF 3 ), indicating that a concerted S E 2 protonolysis mechanism is most likely operative in these electron-poor platinum systems. VT NMR experiments show that benzene coordination to the (dfepe)Pt 2+ center in neat fluorosulfonic acid to form (dfepe)Pt(η 6 -C 6 H 6 ) 2+ at −80 °C is competitive with benzene dissociation in this weakly coordinating medium.
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Kalberer et al. (2004) studied this question.
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