Pyridine and phosphine reactions with [CPh3][B(C6F5)4]

Abstract Trityl borate salts [4-RPyCPh 3 ][B(C 6 F 5 ) 4 ] (R = H 1 , t Bu 2 , Et 3 , NMe 2 4 ) and [R 3 PCPh 3 ][B(C 6 F 5 ) 4 ] (R = Me 5 , n Bu 6 , Ph[1] 7 , p -MeC 6 H 4 8 ) are readily prepared via equimolar reaction of the appropriate pyridine or phosphine and trityl borate [CPh 3 ][B(C 6 F 5 ) 4 ]. The analogous reactions of P i Pr 3 affords the product [( p - i Pr 3 P–C 6 H 4 )Ph 2 CH][B(C 6 F 5 ) 4 ] ( 9 ) while the corresponding reactions of Cy 3 P and t Bu 3 P gave the cyclohexadienyl derivatives [( p -R 3 PC 6 H 5 )CPh 2 ][B(C 6 F 5 ) 4 ] (R = Cy 10 , t Bu 11 ). X-ray structures of 5 and 9 are reported.