title: Electron transfer and CO addition to polynitrido cobalt carbonyl clusters: parallel pathways for conversion of the [Co10N2(CO)19]4- anion to the novel [Co11N2(CO)21]3- anion.
abstract: The redox aptitude of the dinitrido anion [Co10N2(CO)19]4- has been tested from both chemical and electrochemical points of view, together with its reactivity toward CO that induces disproportionation. In any case, through a remarkable overlapping of intermediate steps, the new anion [Co11N2(CO)21]3- (4) is eventually obtained. A detailed study of the pathways to 4 allowed the identification of three labile intermediates by their characteristic IR spectra as well as their electrochemical and paramagnetic properties. The unprecedented structure of trianion 4 has been studied in details in two different crystalline salts.
authors.affiliation: Dipartimento di Biologia Strutturale e Funzionale dell'Università degli Studi dell'Insubria, Via J. H. Dunant 3, 21100 Varese, Italy. alessandro.fumagalli@uninsubria.it
authors.forename: Alessandro
authors.initials: A
authors.lastname: Fumagalli
authors.forename: Paola
authors.initials: P
authors.lastname: Ulivieri
authors.forename: Michela
authors.initials: M
authors.lastname: Costa
authors.forename: Ornella
authors.initials: O
authors.lastname: Crispu
authors.forename: Roberto
authors.initials: R
authors.lastname: Della Pergola
authors.forename: Fabrizia
authors.initials: F
authors.lastname: Fabrizi de Biani
authors.forename: Franco
authors.initials: F
authors.lastname: Laschi
authors.forename: Piero
authors.initials: P
authors.lastname: Zanello
authors.forename: Piero
authors.initials: P
authors.lastname: Macchi
authors.forename: Angelo
authors.initials: A
authors.lastname: Sironi