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Bioinorganic Chemistry and Applications
Volume 2007, Article ID 28508, 6 pages
Research Article

A Mononuclear and a Mixed-Valence Chain Polymer Arising from Copper(II) Halide Chemistry and the Use of 2,2'-Pyridil

1School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, UK
2Institute of Materials Science, National Centre of Scientific Research “Demokritos”, Aghia Paraskevi Attikis 153 10, Greece
3Department of Chemistry, University of Patras, Patras 265 04, Greece
4Laboratory of Inorganic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou 157 71, Greece

Received 14 February 2007; Accepted 14 April 2007

Academic Editor: Jean Pierre Tuchagues

Copyright © 2007 Constantinos J. Milios et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Reactions of 2,2'-pyridil (pyCOCOpy) with CuCl22H2O and CuBr2 in EtOH yielded the mononuclear complex [Cu(pyCOOEt)2Cl2]H2O (1) and the one-dimensional, mixed-valence complex [Cu2ICuII(pyCOOEt)2Br4]n (2), respectively. Both complexes crystallize in the triclinic space group P 1¯. The lattice constants are a=8.382(2), b=9.778(2), c=7.814(2), α=101.17(1), β=114.55(1), γ=94.14(1) for 1 and a=8.738(1), b=9.375(2), c=7.966(1), α=79.09(1), β=64.25(1), γ=81.78(1) for 2. 2,2'-pyridil undergoes a metal-assisted alcoholysis and oxidation leading to decomposition and yielding the ethyl picolinate (pyCOOEt) ligand. The autoredox process associated with the reduction of copper(II) to copper(I) in the case of complex 2 is discussed in terms of the increased redox activity of the copper(II) bromide system relative to the copper(II) chloride system.