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Research article2004Peer reviewed

Isolation, X-ray single crystal and theoretical study of quinquevalent metal oxoisopropoxides, Nb6O8(iPrO)14(iPrOH)2 and Re4O6(OiPr)10

Seisenbaeva, Gulaim; Baranov, Alexei I; Shcheglov, Pavel A.; Kessler, Vadim

Abstract

Oxoisopropoxide complexes of niobium, Nb6O8((PrO)-Pr-i)(14)((PrOH)-Pr-i)(2) (I), and rhenium, Re4O6((OPr)-Pr-i)(10) (II), were isolated as by-products of anodic oxidation of these metals in (PrOH)-Pr-i in the presence of LiCl as conductive additive. The common feature of both structures consists in the occurrence in their molecules of an M4O16 planar core formed in the formal absence of M-M bonding for I and in the presence of electron-deficient but surprisingly short (Re-Re 2.52-2.54 Angstrom) metal-metal bonds in II. The stability of this core for the oxoalkoxide derivatives of rhenium(V,VI) and niobium(V) and poor stability for those of tantalum(V) are discussed based on the results of quantum-chemical calculations. (C) 2003 Elsevier B.V. All rights reserved.

Keywords

niobium; rhenium; oxoalkoxides; electrochemical synthesis; X-ray single crystal; metal-metal bonds; molecular structure; EHT calculations

Published in

Inorganica Chimica Acta
2004, Volume: 357, number: 2, pages: 468-474

      SLU Authors

      UKÄ Subject classification

      Inorganic Chemistry
      Materials Chemistry

      Publication identifier

      DOI: https://doi.org/10.1016/S0020-1693(03)00499-7

      Permanent link to this page (URI)

      https://res.slu.se/id/publ/2895