RT info:eu-repo/semantics/article
T1 Preparation and structural characterization of chloro- and alkyl-isocyanidoniobocene compounds. Synthesis of the 1st dicyclopentadienylniobium species containing iminoacyl groups
A1 Martínez de Ilarduya, Jesús María
A1 Otero Montero, Antonio
A1 Royo Gracia, Pascual
K1 Niobocene complexes
K1 Iminoacyl groups
K1 Ciencia
K1 Química inorgánica
K1 Science
K1 Chemistry, inorganic
AB The reduction of the niobocene complexes Nb(η5-C5H3RR′)2Cl2 (R = H, R′ = SiMe3 (I); R = R′ = SiMe3 (II)) with one equivalent of (1%) sodium amalgam in the presence of an isocyanide ligand R″NC yields Nb(η5-5H3RR′)2Cl(CNR″) (R = H, R′ = SiMe3, R″ = Cy = cyclohexyl (III); tBu (IV); Ph (V); 2,6-Me2C6H3 (VI), and R = R′ = SiMe3, R″ = Cy (VII), tBu (VIII)). Reactions of III and V with LiMe and LiCH2SiMe3 give the thermally stable iminoacyl compounds [Nb(η5-C5H4SiMe3)2-(CRNR′)]n(R = Me, R′ = Cy (IX); R = CH2SiMe3, R′ = Cy (X) and R = Me, R′ = Ph (XII)), through spontaneous insertion of the isocyanide ligand into the alkyl-niobium bond. Insertion of t-BuNC into the metal-alkyl bond in IV was not observed, and only the alkyl isocyanide derivative Nb(η5-C5H4SiMe3)2(Me)(CNtBu) (XI) was isolated. The compounds were characterized by IR and NMR spectroscopy.
PB Elsevier
SN 0022-328X
YR 1988
FD 1988
LK http://hdl.handle.net/10017/4651
UL http://hdl.handle.net/10017/4651
LA eng
DS MINDS@UW
RD 20-abr-2024