First oxidative synthetic route of a novel, linear mixed valence Co(III)-Co(II)-Co(III) complex with bridging acetate and salen

A linear, trinuclear mixed valence complex [Co-II {(mu-L)(mu-OAc)Co-III (NCS)}(2)] has been prepared and its molecular structure has been elucidated on the basis of X-ray crystallography [H2L = salen = 1,6-bis(2-hydroxyphenyl)-2,5-diazahexa-1,5-diene]. The complex contains a high-spin Co-II and two terminal low-spin Co-III, i.e., it is a Co-III(S = 0)-Co-II(S = 3/2)-Co-III (S = 0) trimer. (C) 2006 Elsevier B.V. All rights reserved.