Competing C− F activation pathways in the reaction of Pt (0) with fluoropyridines: Phosphine-assistance versus oxidative addition

…, RN Perutz, SA Macgregor, JE McGrady…

Index: Nova, Ainara; Erhardt, Stefan; Jasim, Naseralla A.; Perutz, Robin N.; Macgregor, Stuart A.; McGrady, John E.; Whitwood, Adrian C. Journal of the American Chemical Society, 2008 , vol. 130, # 46 p. 15499 - 15511

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Citation Number: 73

Abstract

A survey of computed mechanisms for C− F bond activation at the 4-position of pentafluoropyridine by the model zero-valent bis-phosphine complex,[Pt (PH3)(PH2Me)], reveals three quite distinct pathways leading to square-planar Pt (II) products. Direct oxidative addition leads to cis-[Pt (F)(4-C5NF4)(PH3)(PH2Me)] via a conventional 3-center transition state. This process competes with two different phosphine-assisted mechanisms ...