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

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Eulalia Pereira (Author) FCUP; Ligia R Gomes (Author) Other; John N Low (Author) Other; Baltazar de Castro (Author) FCUP

Journal

Title: Polyhedron

Vol. 27

Pages: 335-343

ISSN: 0277-5387

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 12 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9