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Journal of Chemistry
Volume 2015, Article ID 506932, 9 pages
Research Article

New Copper and Oxomolybdate Robson-Type Polynuclear Macrocyclic Complexes: Structure, Spectroscopy, and Electrochemical Properties

Departamento de Química, Universidade Federal do Paraná, Caixa Postal 19081, 81531-990 Curitiba, PR, Brazil

Received 3 October 2015; Revised 26 November 2015; Accepted 29 November 2015

Academic Editor: Theocharis C. Stamatatos

Copyright © 2015 Marcelo Carpes Nunes 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.


The polynuclear complexes [Mo3O8(tidf)]·dmso·2H2O (1) and [Cu2(tidf)2(μ-Mo8O24)] (2) (tidf2− is a symmetrical tetraiminodiphenolate Robson-type macrocyclic ligand) were prepared from equimolar combinations of [Mg2(tidf)](NO3)2·4H2O, [MoO2Cl2(dmso)2] (for 1) and complex 1 and Cu(ClO4)2·4H2O (for 2) in acetonitrile. Molecular structures of both complexes were determined and showed atypical modes of coordination. A significant observation was the remarkable flexibility of the macrocycle ligand that effectively accommodated the steric demands of metal cations and the packing forces and showed a unique mode of coordination. Spectroscopic (UV-vis and FTIR) and redox properties are discussed.