Abstract
AbstractThe formation and bond activation reactions of the d0 carbene complexes MCHCN+ (M = Sc, Y) are presented. Sc+ and Y+ dehydrogenate acetonitrile to produce the metallocarbenes. The carbene complexes are less reactive towards hydrocarbons than their bare metal ion counterparts, but will activate CH, OH, and NH bonds through a four‐centered intermediate. Labeling studies indicate that reactions with olefins proceed by migratory insertion after initial CH activation, and that subsequent ligand coupling produces metal‐bound nitrite products. Oletin metathesis reactions are not observed due to the electron‐withdrawing characteristics of the CN substituent and the electrophilicity of the metal centers.
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