An approach to heterometallic alkoxide-beta-diketonate complexes with a M4O4 cubane-like core and new prospects of their application in preparation of solid catalysts. X-ray single crystal study of (Co,Ni)(4)(acac)(4)(mu(3)-OMe)(4)(MeOH)(4), Co2Ni2(a

摘要

The interaction of the individual M-4(acac)(4)(mu (3)-OMe)(4)(MeOH)(4) complexes, M = Co, Ni in toluene;methanol media provided crystals of (Co,Ni)(4)(acac)(4)(mu (3)-OMe)(4)( MeOH)(4) (I) - the product of co-crystallization of isomorphous products. The oxidation of a MeOH solution of I in air in the presence of NaOAc and aminoalcohols as catalysts gave Co2Ni2(acac)(4)(mu (3)-OMe)(4)(OAc)(2) (II), an individual heterometallic derivative. The interaction of Mg(OCH(CH3)CH2NMe2)(2) with Cu(acac)(2) in toluene/methanol media produced Mg-4( acac)(4)(mu (3)-Me)(4)( MeOH)(4) (III) as the only isolatable product. The starting Co and Ni homometallic complexes as well as the heterometallic CoNi complex II were used to prepare the zeolite-supported oxide catalysts which exhibited extremely high activity towards methanol oxidation. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 17]