Structural and magnetic studies on mono- and polynuclear chromium ascorbate complexes |
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| Authors: | Birgül Zümreoglu-Karan Ahmet N Ay Canan Ünaleroglu Tezer Firat Thomas Ristau Wolfgang Jabs |
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| Institution: | 1.Department of Chemistry,,Hacettepe University,Ankara,Turkey;2.Department of Physics Engineering,Hacettepe University,Ankara,Turkey;3.Institut für Chemie u. Biochemie,E. M. A. Universit?t Greifswald,Greifswald,Germany |
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| Abstract: | Polynuclear chromium ascorbate complexes were isolated and physicochemically analyzed in a comparative manner with their mononuclear
analog (1). Characterization by elemental analysis, electronic, vibrational, 13C-n.m.r and mass spectroscopies, and variable temperature magnetic susceptibility studies, allowed structural proposals for
the binuclear, Cr2(μ-OH)2(H2O)(C6H7O6)3(OH)] · 4H2O (2), and trinuclear, Cr3(μ-O)3(H2O)6(C6H7O6)3] · 4 H2O (3) complexes. The pseudo-octahedral CrIII centers were suggested to be connected through hydroxo bridges in (2) and in (3) by oxo bridges forming a hexocyclic ring.
An erratum to this article is available at . |
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