New class of mixed sandwich cycloheptatrienylchromium complex: crystal structures of the redox pair [Cr(η-C6H5Me)(η-C7H6C6H4Me-4)][PF6]n(n= 1 or 2)

Abstract

The mixed sandwich complex [Cr(η-C₆H₅Me)(η-C₇H₆C₆H₄Me-4)][PF₆]1 underwent a reversible one-electron oxidation to the radical dication [Cr(η-C₆H₅Me)(η-C₇H₆C₆H₄Me-4][PF₆]₂2; X-ray crystallographic studies on the redox pair revealed that the principal structural alteration resulting from oxidation is a small increase in the metal-to-ring distances.