An approach to heterometallic alkoxide-β-diketonate complexes with a M 4O 4 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(μ 3-OMe) 4(MeOH) 4, Co 2Ni 2(acac) 4(μ 3-OMe) 4(OAc) 2 and Mg 4(acac) 4(μ 3-OMe) 4(MeOH) 4

Abstract

The interaction of the individual M 4(acac) 4(μ 3-OMe) 4(MeOH) 4 complexes, M=Co, Ni in toluene/methanol media provided crystals of (Co,Ni) 4(acac) 4(μ 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 Co 2Ni 2(acac) 4(μ 3-OMe) 4(OAc) 2 ( II), an individual heterometallic derivative. The interaction of Mg(OCH(CH 3)CH 2NMe 2) 2 with Cu(acac) 2 in toluene/methanol media produced Mg 4(acac) 4(μ 3-OMe) 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.