Russian Chemical Bulletin

, Volume 61, Issue 4, pp 821–827 | Cite as

Crystal and molecular structures of mixed-valence octanuclear cobalt(ii,iii) propionate and butyrate with an etagere-like core

  • A. I. FischerEmail author
  • V. A. Kuznetsov
  • A. V. Shchukarev
  • A. N. Belyaev
Full Articles


The new mixed-valence octanuclear cobalt carboxylate complexes [CoII 4CoIII 44-O)4-(μ3-OMe)4(μ-O2CR)6(O2CR)2(H2O)6]·4H2O, where R = Et (3) or n-Pr (4), were investigated by X-ray diffraction analysis. Complexes 3 and 4 have a molecular octanuclear structure, and they are valence trapped, and contain four cobalt atoms Co3+ in the central cubane fragment with four cobalt atoms Co2+ at the periphery of the molecules. The molecules of the complexes are stabilized by four intramolecular hydrogen bonds and are linked, together with water solvent molecules, by intermolecular hydrogen bonds to form a three-dimensional supramolecular system.

Key words

cobalt carboxylate complexes mixed-valence complexes X-ray diffraction analysis supramolecular ensembles 


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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • A. I. Fischer
    • 1
    Email author
  • V. A. Kuznetsov
    • 1
  • A. V. Shchukarev
    • 2
  • A. N. Belyaev
    • 1
  1. 1.Saint Petersburg State Institute of Technology (Technical University)Saint PetersburgRussian Federation
  2. 2.Umeå UniversityUmeåSweden

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