A More Reactive Trigonal-Bipyramidal High-Spin Oxoiron(IV) Complex with a cis-Labile Site

摘要

The trigonal-bipyramidal high-spin (S = 2)oxoiron(IV) complex [Fe~(IV)(O)(TMG_2dien)(CH3CN)]~(2+) (7) was synthesized and spectroscopically characterized. Substitution of the CH_3CN ligand by anions, demonstrated here for X = N_3~- and Cl~-, yielded additional S = 2 oxoiron(IV) complexes of general formulation [Fe~(IV)(O)-(TMG_2dien)(X)]~+ (7-X). The reduced steric bulk of 7 relative to the published S = 2 complex [Fe~(IV)(O)-(TMG_2tren)]~(2+) (2) was reflected by enhanced rates of intermolecular substrate oxidation.