Trifluoromethyl Coordination and C-F Bond Activation at Calcium

摘要

At more than 120 kcalmol~(-1)the bond dissociation energy of the C-F a bond is larger than that of any other OX single bond.'11 This factor,together with the reluctance of the C-F moiety to engage in coordination to metal centers,results in a notable chemical stability.As a result,the selective activation and cleavage of C-F bonds has been recognized as a great intellectual and practical challenge which,in turn,has attracted a diverse collection of workers concerned with the identification of both stoichiometric and catalytic reactivities.