Nickel(II) complexes with N2OS and N2S2 co-ordination spheres: reduction and spectroscopic study of the corresponding Ni(I) complexes

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

Gomes, L (Autor) Outra; Pereira, E (Autor) FCUP; de Castro, B (Autor) FCUP

Revista

Título: Journal of the Chemical Society. Dalton Transactions

Páginas: 1373-1379

ISSN: 1472-7773

Editora: Royal Society of Chemistry

Indexação

ISI Web of Knowledge - 81 Citações

Scopus - 59 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-001-1TB

DOI: 10.1039/a908330h

Abstract (EN): Nickel(II) complexes with Schiff-bases obtained by condensation of 1,3-propanediamine with salicylaldehyde and thiosalicylaldehyde, which present a N2OS or N2S2 co-ordination sphere, were synthesized and studied. The molecular and crystal structure of the asymmetric complex [2-({3-[(3,5-dichloro-2-hydroxyphenyl)methyleneamino]propyl}iminomethylene)benzenethiolato-O,N,N',S]nickel(II) [Ni(t-salCl(2)salpd)] has been determined by X-ray crystallography and shows a tetrahedrally distorted square-planar co-ordination geometry for the nickel center. The complexes were characterized by spectroscopic and electrochemical techniques and the results were used to assess the influence of the donor-atoms on their chemical properties. The results obtained show that the compounds may be reduced, either chemically or electrochemically, to Ni(I) complexes. Reduction potentials were found to be strongly dependent on the tetrahedral distortion of the Ni(II) complexes. EPR parameters for Ni(I) complexes, although not very sensitive to ligand substituents, show a regular dependence on the co-ordination set and the tetrahedral distortion of the complexes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7