title: Electronic structure and spectra of linkage isomers of bis(bipyridine)(1,2-dihydroxy-9,10-anthraquinonato)ruthenium(ii) and their redox series.
abstract: Linkage isomers of bis(bipyridine)(1,2-dihydroxy-9,10-anthraquinonato)ruthenium(II), 1,2- and 1,9-coordinated complexes, and several of their oxidation products have been prepared chemically and/or electrochemically. For the 1,2-coordinated complex, the one- and two-electron oxidized species have been characterized, and for the 1,9-coordinated complex, the one-electron oxidized species has been characterized. The rich redox activity of these complexes leads to ambiguity in assessing the electronic structure. This paper reports EPR spectra of odd-electron species and detailed analyses of electronic spectra and structure of the complexes, based on INDO molecular orbital calculations. Results of calculations on the related 1-hydroxyanthraquinone complex and the free ligands,1,2-dihydroxy-9,10-anthraquinone (alizarin) and 1-hydroxyanthraquinone, are also briefly discussed.
authors.affiliation: Department of Chemistry, York University, Toronto, Ontario, Canada M3J 1P3.
authors.forename: Antonietta
authors.initials: A
authors.lastname: DelMedico
authors.forename: Elaine S
authors.initials: ES
authors.lastname: Dodsworth
authors.forename: A B P
authors.initials: AB
authors.lastname: Lever
authors.forename: William J
authors.initials: WJ
authors.lastname: Pietro