Geneviève Cerveau
Centre national de la recherche scientifique
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Featured researches published by Geneviève Cerveau.
Journal of Organometallic Chemistry | 1982
F. Carre; Geneviève Cerveau; Ernesto Colomer; Robert J. P. Corriu
The attachment of triorganogermyl ligands to transition metals by displacement of a CO ligand is described. The optical stability of the germyl anions has been used to prepare a nickel-germanium complex by displacement of chloride (this reaction representing a limiting case) and more generally in the synthesis of germanium-transition metal bonds by displacement of CO (the transition metal being Cr, Mo, W, Mn, Fe, or Co). Optically active germyl anions are used in the synthesis of carbene complexes by insertion of CO ligands into a carbon-transition metal sigma bond. A crystallographic study of the complex MePh-(1-Np)Ge(CO)4MnC(OEt)Me reveals that the carbene unit is cis to the germanium and that the germyllithium has reacted with retention of configuration.
Journal of Organometallic Chemistry | 1981
Geneviève Cerveau; Gerard Chauviere; Ernesto Colomer; Robert J. P. Corriu
UV irradiation of complexes of the type (η5-C5H5)(CO)nMSiR3 (n = 2, M ue5fb Fe; n = 3, M ue5fb Mo) in the presence of phosphorus ligands such as P(XC6H5)3 (X ue5fb O, S, CH2) and phosphines containing allyl, 1-naphthyl or tolyl groups gives cyclometalated complexes, R3SiH being eliminated with retention of configuration at Si. In the cyclometalation five-membered rings are formed in preference to six-membered rings, and metalation occurs more easily at sp2 than at sp3 carbon atoms. Methylphenyl-1-naphthylphosphine undergoes rapid racemization upon UV irradiation at room temperature.
International Journal of Mass Spectrometry and Ion Processes | 1989
Geneviève Cerveau; Claude Chuit; Robert J. P. Corriu; Catherine Reyé; Jean-Louis Aubagnac
Abstract FAB spectra in the negative ion mode allow characterization of anionic pentacoordinated silicon complexes and dianionic hexacoordinated silicon and germanium complexes. With the dianionic derivatives, identification occurs from cluster ions which also allow characterization of the cation. With the three matrices used (glycerol, ortho-nitrobenzyl alcohol (NBA) and “magic bullet”), different spectra were obtained and compared. With glycerol, the reactivity described by Rose and co-workers (substitution of catechol by glycerol) (Int. J. Mass Spectrom. Ion Processes, 87 (1989) 225) has been confirmed for alkali silicates.
Journal of Organometallic Chemistry | 1989
Alain Boudin; Geneviève Cerveau; Claude Chuit; Robert J. P. Corriu; Catherine Reyé
Abstract A study has been made of the reactivity of the anionic hexacoordinate silicon complex Si( o -O 2 C 6 H 4 ) 3 ] 2- 2Na + ( 1 ) and some pentacoordinate complexes [RSi( o -O 2 C 6 H 4 ) 2 - M + ( 2 ) towards reducing alkyl Grignard reagents activated by Cp 2 TiCl 2 . The reaction products depend on the nature of the Grignard reagent; with the primary alkyl reagents the main product is the monohydrogenosilane, but with secondary and tertiary alkyl reagents it is the dihydrogenosilane. The results are interpreted in term of a competition between replacement of Siue5f8O bonds by Siue5f8alkyl bonds on the one hand and reduction on the other.
Phosphorus Sulfur and Silicon and The Related Elements | 1989
Geneviève Cerveau; Claude Chuit; Robert J. P. Corriu; L. Gerbier; Catherine Reyé
Abstract The unexpected behaviour of hypervalent anionic silicon (and germanium) species [Si(o-O2C6H3R)3 2-2M+, [RSi(o-O2C6H3R)2]−M+ and [Ge(o-O2C6H3R)3]2-2M+ (R = H, NO2) in the presence of some nucleophilic reagents involving a possible single electron transfer process is described. This capacity to accept electrons depends on both constituents of the complexes (ligand, central atom (Si or Ge), cation associated to the complex) and the nature of the reagents (PhCH2MgBr, Cp(CO)2Fe Na, Li/Me3SiCl/THF system).
Journal of Organometallic Chemistry | 1987
Geneviève Cerveau; Ernesto Colomer; Robert J. P. Corriu; André Vioux
Abstract Reaction of optically active MePh(1-C10H7)GeLi with (η5-C5H5)M(CO)2NO (M = Mo, W) results in replacement of CO and formation of anionic species which can be alkylated with CH3I to afford mixtures of diastereoisomeric complexes, (η5-C5H5)M(CO)(NO)(GeR3)CH3 (R3 = MePh(1-C10H7); M = Mo, W). These complexes are the first in which a transition metal, surrounded by five different ligands shows optical activity. These compounds are not fluxional and show a high optical stability; under forcing conditions decomposition occurs before epimerisation.
Organometallics | 1988
A. Boudin; Geneviève Cerveau; Claude Chuit; Robert J. P. Corriu; Catherine Reyé
Organometallics | 1991
Geneviève Cerveau; Claude Chuit; Robert J. P. Corriu; Catherine Reyé
Comptes Rendus Chimie | 2010
Damien Hérault; Fabiano Severo Rodembusch; Leandra Campo; Marc Gingras; Geneviève Cerveau; Robert J. P. Corriu
Organometallics | 1988
Geneviève Cerveau; Claude Chuit; Robert J. P. Corriu; Catherine Reyé