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

Milios, Constantinos J.; Raptopoulou, Catherine P.; Terzis, Aris; Perlepes, Spyros P.; Papaefstathiou, Giannis S.

doi:https://doi.org/10.1155/2007/28508

Bioinorganic Chemistry and Applications

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Volume 2007 | Article ID 028508 | https://doi.org/10.1155/2007/28508

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

Constantinos J. Milios,¹Catherine P. Raptopoulou,²Aris Terzis,²Spyros P. Perlepes,³and Giannis S. Papaefstathiou⁴

Academic Editor: Jean Pierre Tuchagues

Received14 Feb 2007

Accepted14 Apr 2007

Published15 Jul 2007

Abstract

Reactions of 2,2'-pyridil (pyCOCOpy) with CuCl2⋅2H2O 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.

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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.

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