Mononuclear to tetranuclear structural transformation in vanadyl complexes of 3-hydroxypyridine-2-carboxylic acid (H(2)hpic)

Yano S; Nakai M; Sekiguchi F; Obata M; Kato M; Shiro M; Kinoshita I; Mikuriya M; Sakurai H; Orvig C

Chemistry Letters, Vol.31, No.9, 916-917, 2002

Yano S, Nakai M, Sekiguchi F, Obata M, Kato M, Shiro M, Kinoshita I, Mikuriya M, Sakurai H, Orvig C

Reaction of vanadyl sulfate with 3-hydroxypyridine-2-carboxylic acid (H(2)hpic) affords two chargeless complexes, [VO(Hhpic-O,O)(Hhpic-O,N)(H2O)].3H(2)O (1) and unprecedented cyclic tetranuclear complex [(VO)(4)(mu-(hpic-O,O',N))(H2O)(4)].8H(2)O (2), which were characterized by X-ray crystallographic analysis. The unique structural transformation between complexes 1 and 2 was found.