A Novel Octanuclear Vanadium(V) Oxide Cluster Complex Having an Unprecedented Neutral V8O20 Core Functionalized with 4,4′-Di-tert-butyl-2,2′-bipyridine

A novel octanuclear vanadium­(V) oxide cluster complex, [V8O20(4,4′-tBubpy)4] (1), was synthesized and characterized by single-crystal X-ray structure analysis to reveal that 1 has an unprecedented neutral V8O20 core. An unexpected interconversion between 1 and the methoxo­(oxo)­vanadium­(V) cluster complex, [V4O8(OMe)4(4,4′-tBubpy)2] (2), was observed upon changes in the solvent systems.