Synthesis and structural analyses of Co(III) coordination compounds of 2-(2 '-pyridyl)benzimidazole and 2-(2-hydroxyphenyl)-1H-benzimidazole
Por:
Quezada-Buendía X., Esparza-Ruiz A., Pena-Hueso, A, Barba-Behrens N., Contreras R., Flores-Parra A., Bernes, S, Castillo-Blum S.E.
Publicada:
27 jun 2008
Resumen:
The synthesis and characterization of the tris-chelate Co(III) coordination compounds: [Co(2pb)(3)] center dot 2C(3)H(6) center dot 21/2H(2)O (3) prepared from 2-(2'-pyridyl) benzimidazole (1), and [Co(2fb)(3)] center dot 2C(2)H(5)OH center dot H(2)O (4) synthesized from (o-hydroxyphenyl) benzimidazole (2) are discussed. The structures of compounds 3 and 4 were determined by NMR spectroscopy. The X-ray crystal analyses of compounds 2-4 were performed. In the cobalt(III) compounds, the deprotonated benzimidazolic ligands form five (1) and six (2) membered rings, respectively. In the first case the ligands are planar, while for the latter the ligands are twisted. The configuration of the metal centre in compounds 3 and 4 corresponds to the less symmetric mer isomer (C(1) symmetry). Supramolecular networks are stabilized by the insertion of water molecules able to form hydrogen bonds. (C) 2008 Elsevier B.V. All rights reserved.
Filiaciones:
Quezada-Buendía X.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, Mexico
Esparza-Ruiz A.:
Departamento de Química, Cinvestav, A.P. 14-740, Mexico, D.F. 07000, Mexico
Barba-Behrens N.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, Mexico
Contreras R.:
Departamento de Química, Cinvestav, A.P. 14-740, Mexico, D.F. 07000, Mexico
Flores-Parra A.:
Departamento de Química, Cinvestav, A.P. 14-740, Mexico, D.F. 07000, Mexico
Castillo-Blum S.E.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Inorgan, Mexico City 04510, DF, Mexico
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