Structural and magnetic studies on mono- and polynuclear chromium ascorbate complexes
TRANSITION METAL CHEMISTRY, vol.30, no.4, pp.451-459, 2005 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 30 Issue: 4
- Publication Date: 2005
- Doi Number: 10.1007/s11243-005-1035-0
- Journal Name: TRANSITION METAL CHEMISTRY
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.451-459
- Hacettepe University Affiliated: Yes
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, C-13-n.m.r and mass spectroscopies, and variable temperature magnetic susceptibility studies, allowed structural proposals for the binuclear, [Cr-2(mu-OH)(2)(H2O)(C6H7O6)(3)(OH)] center dot 4H(2)O (2), and trinuclear, [Cr-3(mu-O)(3)(H2O)(6)(C6H7O6)(3)] (center dot) 4 H2O (3) complexes. The pseudo-octahedral Cr-III centers were suggested to be connected through hydroxo bridges in (2) and in (3) by oxo bridges forming a hexocyclic ring.