Journal
POLYHEDRON
Volume 28, Issue 15, Pages 3209-3220Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2009.05.077
Keywords
Chromium toxicity; Synthesis; X-ray structure; Cr(III)-citrate interactions; pH-structural variants; Magnetic susceptibility; Precursors to advanced materials
Categories
Funding
- PENED
- Greek Ministry of Development-GSRT (25%)
Ask authors/readers for more resources
In an attempt to understand the aqueous interactions of Cr(III) with the low molecular mass physiological ligand citric acid, the pH-specific synthesis in the binary Cr(III)-citrate system was pursued, leading to the new complexes Na-3[Cr(C6H5O7)(2)]center dot 8.5H(2)O (1) and (Hdmphen)(6)[Cr(C6H5O7)(2)]center dot(NO3)(3)center dot 14H(2)O (2). Complexes 1 and 2 were characterized by elemental analysis, spectroscopic, structural, thermal, and magnetic susceptibility studies. The structures of 1 and 2 reveal a mononuclear octahedral complex of Cr(III) with two citrate ligands bound to it. Albeit of the same deprotonation state. the disposition of the two citrate ligands with respect to Cr(III) differs between 1 and 2 in the solid state, thus reflecting the presence of pH-structural variants in the requisite binary system. This conformational difference is lifted in aqueous solution, thus providing (a) comparative information on the distribution and diversity of species in the binary Cr(III)-citrate system, and (b) insight into the nature of interactions developing in the binary Cr(III)-hydroxycarboxy late systems in abiotic and biological applications. (C) 2009 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available