SPECTROSCOPIC AND MAGNETIC-PROPERTIES OF LOW-SPIN CHROMIUM(II) TRIS COMPLEXES WITH THE BIDENTATE ALPHA-DIIMINE LIGANDS - 2,2'-PYRIDYLBENZIMIDAZOLE, 2,2'-PYRIDYLIMIDAZOLE AND 2,2'-PYRIDYLIMIDAZOLINE

• Tipo: Artigo em Revista Científica Internacional
• Data: 1990

Autores

DECASTRO, B (Autor) FCUP; FREIRE, C (Autor) FCUP

Revista

Título: Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry

Vol. 20

Páginas: 1-12

ISSN: 0094-5714

Editora: Marcel Dekker Inc.

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 4 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-001-S8V

DOI: 10.1080/00945719008049865

Abstract (EN): The preparation and physical properties of new chromium (II) complexes of general formula [ Cr ')3] Cl2. n H2O [ L-L¿ = 2,2¿-pyridyl-benzimidazole (pyb); 2,2¿-pyridylimidazole(pyi) and 2,2'-pyridylimidazo-line (pyim)] are reported. The effective magnetic moments are close to the spin only value for low-spin d4electronic configurations and invariant in the temperature range studied (300 K to 90 K). The electronic spectra (solution and Nujol mulls) show several intense bands in the 8,000 to 30,000 cm-1 region. Both results support the existence of monomeric, low spin, hexacoordinate species with trigonal symmetry.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12