A rhodium α-hydroxylalkyl complex (1) reacts rapidly with Brookhart's acid, [H(OEt 2 ) 2 ][B(3,5-(CF 3 ) 2 -C 6 H 3 ) 4 ], to generate a cationic PC carbene P complex (2). Complex 2 can also be accessed from salt metathesis of an α-hydroxyalkyl hydrochlorido rhodium(III) complex (4) with Na[B(3,5-(CF 3 ) 2 -C 6 H 3 ) 4 ]. The reactivity of compound 2 is explored through a series of reactions with various nucleophilic and electrophilic reagents.Figure 1. (top) Reported access to metal alkylidene complexes via double C−H activation and dehydrochlorination. (bottom) Formation of metal carbene complexes through dehydration reported herein. Article pubs.acs.org/Organometallics
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