ELECTROCHEMICAL AND CHEMICAL-REDUCTION OF NIOBOCENE DICHLORIDES IN THE PRESENCE OF CARBON-DIOXIDE

Authors
ELKRAMI S MOURAD Y MUGNIER Y ANTINOLO A DELHIERRO I GARCIAYUSTE S OTERO A FAJARDO M BRUNNER H GEHART G WACHTER J AMAUDRUT J
Citation
S. Elkrami et al., ELECTROCHEMICAL AND CHEMICAL-REDUCTION OF NIOBOCENE DICHLORIDES IN THE PRESENCE OF CARBON-DIOXIDE, Journal of organometallic chemistry, 498(2), 1995, pp. 165-170
Citations number
43
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Journal of organometallic chemistry → ACNP
ISSN journal
0022328X
Volume
498
Issue
2
Year of publication
1995
Pages
165 - 170
Database
ISI
SICI code
0022-328X(1995)498:2<165:EACOND>2.0.ZU;2-E
Abstract
The chemical and electrochemical reduction of the niobocene dichloride s [Nb(eta(5)-C(5)H(4)SiMe(3))(2)Cl-2] 1, [Nb(eta(5)-C(5)Me(5))(2)Cl-2] 2 and [Nb(eta(5)-C(5)Me(4)Et)(2)Cl-2] 3, in the presence of carbon di oxide has been investigated. Formation of compounds of the type [Cp(2) Nb(CO2)] and [Cp(2)(())NbCl(CO2)](1) has been established by means of IR, ESR and/or NMR spectroscopy. They contain a labile eta(2)-CO2. Th e order of stability increases with the degree of substitution the Cp. Less stable intermediates in the reduction of the system [Cp(2)NbCl(2 )]/CO2 are discussed on the basis of cyclovoltammetric and coulometric data.