Accession Number:

ADA225382

Title:

The Use of Optical Electronegativities to Assign Electronic Spectra of Semiquinone Complexes

Descriptive Note:

Technical rept. no. 35, Aug 1989-Aug 1990

Corporate Author:

YORK UNIV NORTH YORK (ONTARIO)

Personal Author(s):

Report Date:

1990-08-03

Pagination or Media Count:

26.0

Abstract:

Semiquinone complexes of a wide range of transition metals show ligand to metal charge transfer transitions in their electronic spectra. Using the optical electronegativity approach it has been shown that these assignments are consistent with one another. The optical electronegativity of 3,5-di-t- butylseminquinone is found to vary from 1.2 to 1.5, depending on the metal ion. In cases where the optical electronegativity appears to lie outside these limits alternative assignments are discussed. Optical electronegativities for 2,2- bipyridine, 2,2-bipyrazine and 2-picolinic acid N-oxide are also reported. Catechols, semiquinones and quinones, known as dioxolenes, are non-innocent ligands, related to one another by one-electron transfers. These ligands are of interest for their biological importance, redox and magnetic properties. Russian translations, Organic compounds.

Subject Categories:

  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE