6838-45-5Relevant academic research and scientific papers
Phenyl(fluoro)chlorodisiloxanes
Basenko,Zelenkov,Voronkov,Albanov
scheme or table, p. 242 - 244 (2010/08/05)
Cohydrolysis of phenyltrichlorosilane with phenyl(fluoro)dichloro- and phenyl(difluoro)-chlorosilanes and thermolysis of the formed siloxanes leading to the formation of phenyl(difluoro)chlorosilane are studied. The scheme of thermal decomposition of disi
Syntheses and Structural Analyses of 1,3-Diphenyldisiloxanes as a Building Block of Silsesquioxanes
Seto, Isamu,Gunji, Takahiro,Kumagai, Kaoru,Arimitsu, Koji,Abe, Yoshimoto
, p. 1983 - 1987 (2007/10/03)
Syntheses of novel 1,3-diphenyldisiloxanes were investigated. 1,1,3,3-Tetrachloro-1,3-diphenyldisiloxane (1) and 1,1,3,3-tetraisocyanato-1,3-diphenyldisiloxane (2) were obtained by vapor-phase hydrolytic condensation of trichloro(phenyl)silane and triisoc
Atrane Analogous Compounds of the Type (I)
Grobe, Joseph,Henkel, Gerald,Krebs, Bernt,Voulgarakis, Nikolaos
, p. 341 - 351 (2007/10/02)
Heterocyclic cage compounds of type I (compounds 8 - 10) have been prepared by condensation reactions of 1,2,2-trifunctional disilanes Me(R)XSiSiMeX2 (R = Me, Ph, OEt; X = NMe2, OEt) with triethanolamine using the "Dilution Principle".The starting compounds are obtained by Si - Me cleavage of Si2Me6 with acetylchloride/AlCl3 followed by either aminolysis with HNMe2 or alcoholysis with EtOH. 1H NMR spectra indicate N -> Si(1) intraction with the more acidic Si atom in 8 and 9.This result is proved by the X-ray structure analysis of 8 (monoclinic, P 21/c; a = 7.088(2), b = 15.070(4), c = 12.701(4) Angstroem, β = 104.96(2) at -130 deg C, Z = 4); the Si(1) *** N distance is found to be 2.768 Angstroem, connected with a significant angular distortion of the tetrahedral coordination around Si(1) towards a trigonal bipyramid.In compound 10, too, N -> Si(1) coordination is observed at room temperature in spite of almost equal acidity for both Si atoms.This can be explained by the preference of 5- over 6-membered chelating ring systems.At higher temperatures the 1H NMR spectra show a fluctuation of the N-donor between the two Si centres. - Key words: Silatranes, Transanular N -> Si-Interactions, NMR Spectra, X-Ray
ADDITION 1-3 D'HYDROSILANES ET STANNANES SUR DIVERSES NITRONES : RADICAUX NITROXYDES α-METALLES R3M-C-N.-O ET O- ET C-METALLA-HYDROXYLAMINES R3M-O-N-C-H ET R3M-C-N-OH
Riviere, Pierre,Richelme, Suzanne,Riviere-Baudet, Monique,Satge, Jacques,Riley, Paul I.,et al.
, p. 1663 - 1683 (2007/10/02)
Free radical 1,3-addition of silanes or stannanes to various nitrones generally leads to corresponding O-organometallohydroxylamines.The α-metallonitroxide radicals =-M-C-N.-O, obtained by trapping silyl or stannyl-centred radicals with an appropriate nitrone, have been characterised by e.s.r. spectroscopy.The O-stannylhydroxylamines are generally sufficiently stable to be isolated by distillation under vacuum.The less stable O-germyl or O-silylhydroxylamines decompose readily upon heating or by photolysis by competing intra- and intermolecular processes.Under special conditions favouring the formation of silylanions (MeNO2, NEt3), a competitive 1,3-dipolar addition of phenyldichloro- or trichlorosilane with the nitrone leads to the unstable C-metallohydroxylamine =-M-C-N-OH .
