EPR characterisation of nickel(III) complexes with N2O2 Schiff base ligands derived from naphthaldehyde and their pyridine adducts

• Type: Article in International Scientific Journal
• Date: 1998

Authors

Freire, C (Author) FCUP; de Castro, B (Author) FCUP

Journal

Title: Polyhedron

Vol. 17

Pages: 4227-4235

ISSN: 0277-5387

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 37 Citations

Scopus - 37 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-001-9MR

DOI: 10.1016/s0277-5387(98)00233-2

Abstract (EN): Nickel(II) complexes with quadridentate N2O2 Schiff base ligands derived from naphthaldehyde have been synthesised and their oxidative chemistry was studied in N,N'-dimethylformamide and in dimethylsulfoxide. Electrochemical and EPR data for the oxidised solutions have revealed that in these strong coordinating solvents, only the complexes with aliphatic imine bridges were oxidised to low spin six-coordinate nickel(III) complexes, in a (2)A(1)(d(z)(2)) ground state, formulated as [Ni(III)(L). S-2](+), where S stands for a solvent molecule. Upon addition of pyridine to fluid solutions of [Ni(III)(L). S-2](+), new species were formed that on the basis of their EPR spectra can be formulated as [Ni(III)(L). py(2)](+). Extensive electronic characterisation of the NI(III) compounds was made by coupling EPR and electronic spectroscopic data.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9