521125-60-0Relevant articles and documents
Arylimido niobium(V) complexes: Mononuclear and dendritic derivatives
Benito, José M.,de Jesús, Ernesto,de la Mata, F. Javier,Flores, Juan C.,Gómez, Rafael,Gómez-Sal, Pilar
, p. 258 - 267 (2007/10/03)
The compound 4-LiC6H4N(SiMe3)2 reacted in tetrahydrofuran with SiMe3Cl or with silicon-chloride groups located at the periphery of carbosilane dendrimers of first, second, and third generation to afford (SiMe3)2)2)4 (7), and Si(CH2CH2CH2SiMe(CH2 CH2CH2SiMe (CH2CH2CH 2SiMe2C6H4N(SiMe 3)2)2)2)4 (8). The N,N-bis(trimethylsilyl) aniline groups of 3 reacted with niobium pentachloride in acetonitrile or [NbCp′Cl4] (Cp′ = η5-C5H4SiMe3) in dichloromethane to give imido mononuclear complexes [Nb(NC6H4SiMe3-4)Cl3 (CH3CN)2] (4) and [NbCp′(NC6H4SiMe3-4)Cl 2] (5), respectively. Reaction of dendrimers 6-8 and [NbCp′Cl4] in CH2Cl 2 afforded metallodendrimers [Si(CH2CH 2CH2SiMe2C6H4N = NbCp′Cl2)4] (9), [Si(CH2CH 2CH2SiMe(CH2CH2CH 2SiMe2C6H4N = NbCp′Cl2)2)4] (10), and [Si(CH2CH2CH2SiMe (CH2CH2CH2SiMe(CH2 CH2-CH2SiMe2C6 H4N = NbCp′Cl2)2) 2)4] (11), in which the metal moieties are linked to the carbosilane framework through imidometal bonds. The structure of complexes 4 and 5 has been determined by X-ray diffraction methods.
