Comparative analysis of the electronic and EPR spectra of copper(II) and nickel(I) complexes; insights into nickel(I) electronic structure

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Valente, M (Autor) Outra; Freire, C (Autor) FCUP; de Castro, B (Autor) FCUP

Revista

Título: Journal of the Chemical Society. Dalton Transactions

Páginas: 1557-1562

ISSN: 1472-7773

Editora: Royal Society of Chemistry

Indexação

ISI Web of Knowledge - 22 Citações

Scopus - 24 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-001-7X1

DOI: 10.1039/a800835c

Abstract (EN): The nickel(I) complex with the ligand 1,2-bis(pyridine-2-carboxamido)benzene (H(2)bphen), generated by reduction with sodium amalgam of the homologous nickel(II) complex, has been studied by EPR and electronic spectroscopy. The electronic, structural and bonding properties of the complex were elucidated based on a comparison of the EPR and UV/VIS data of isoelectronic complexes of (CUII)-C-63 and Ni-61(I) Of H(2)bphen. Analysis of the spectroscopic data revealed that the complex exhibits low covalency in the sigma in-plane bonding and high covalency in the out-of-plane pi bonds, and has enabled the assignment of the electronic bands at approximate to 13500 and 19600 cm(-1) of [Ni-I(bphen)](-) to d(xz), d(yz) <-- d(xy) and d(x2-y2) <-- d(xy) transitions. Implications for the spectral characterization of cofactor F-430 systems are also presented.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6