Synthesis, spectroscopic, electrochemical and structural characterization of Cu(II) complexes with asymmetric NN ' OS coordination spheres

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Eulalia Pereira (Autor) FCUP; Ligia R Gomes (Autor) Outra; John N Low (Autor) Outra; Baltazar de Castro (Autor) FCUP

Revista

Título: Polyhedron

Vol. 27

Páginas: 335-343

ISSN: 0277-5387

Editora: Elsevier

Indexação

ISI Web of Knowledge - 13 Citações

Scopus - 12 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-004-20P

DOI: 10.1016/j.poly.2007.09.030

Abstract (EN): A set of four Cu(II) complexes, [Cu(cdnapen)], [Cu(cdnappd)], [Cu(cdMenappd)] and [Cu(cdMeMeOsalpd)], derived from Schiff base ligands with an asymmetric NN'OS coordination sphere have been synthesized. The molecular and the crystal structures have been determined by X-ray diffractometry. The structural results confirm that the complexes are tetra coordinated. The copper (II) ion coordinates to two nitrogen atoms from the imine moiety of the ligand, a sulfur atom from the methyl dithiocarboxylate moiety and a phenolic oxygen atom. The complexes show an unusual tetrahedral distortion to the square-planar geometry around the metal centre in spite of the pseudomacrocyclic skeleton of the ligand. The complexes were further characterized by cyclic voltammetry and electron paramagnetic resonance spectroscopy. The degree of tetrahedral distortion of the complexes appears to be dependent on the number of carbon atoms of the aliphatic bridge and the nature of the coordinating atoms.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9