Synthesis of tetranuclear and pentanuclear vanadium-oxide-carboxylate aggregates

Abstract

Treatment of VOCl42– with tca–(tca–= thiophene-2-carboxylate) under aerobic conditions leads to formation of [V5O9Cl(tca)4]2–, whereas if AgNO3 is also present, the product is [V4O8(NO3)(tca)4]2–; the two anions have been isolated as NR4+ salts and their unusual structures elucidated by crystallographic methods.