New polymeric compounds containing vanadium–oxygen chains

Abstract

The controlled protonation of complexes of tetradentate Schiff-base anions, L2–, [VO(L)], has been found to yield [V(OH2)(L)]2+, [V(L)OV(L)]2+, [V(L)OV(L)OV(L)]2+ or [V(L)OV(L)OV(L)OV(L)]2+, depending on reaction conditions. The crystal structures of two salts of the last where L =N,N′-ethylenebis(salicylideneiminate) have been determined, and compared with those of the known [V(L)OV(L)O]+ and the new [{V(L)OV(L)}2]2+. These compounds are the first members of what appears to be an extensive family of compounds containing vanadium–oxygen chains.