37943-96-7Relevant academic research and scientific papers
Synthesis, 1H, 13C, and 29Si nuclear magnetic resonance spectra and crystal structure of trans-1,4-diphenyldecamethylcyclohexasilane
Kumar, Kanta,Litt, Morton H.,Chadha, Raj K.,Drake, John E.
, p. 437 - 440 (2007/10/02)
The coupling reaction between PhMeSiCl2 and Me2SiCl2 in the presence of Na/K alloy resulted in a variety of phenylated permethylcyclohexasilanes of which only trans-1,4-Ph2Me10Si6 could be obtained in pure form by repeated recrystallizations.It was studied by means of nmr (1H, 13C, and 29Si) and X-ray crystallography.The crystals are monoclinic, P21/c with a = 10.105(6), b = 14.77(1), c = 9.973(6) Angstroem, β = 94.08(5) deg, V = 1485(2) Angstroem3, and Z = 2 for 1922 unique "observed" reflections and the structure refined to an R index of 0.036.The molecule has site symmetry 1 and the chair conformation of cyclohexane, with the two phenyl rings occupying the equatorial positions.
SYNTHESIS AND PROPERTIES OF SUBSTITUTED METHYLCYCLOPOLYSILANES
Helmer, Bradley J.,West, Robert
, p. 21 - 32 (2007/10/02)
Co-condensation of five equivalents Me2SiCl2 and one equivalent RR'SiCl2 with lithium provides the five- and six-membered rings RR'Si(Me2Si)4 and RR'Si(Me2Si)5.This method provides a direct route to the phenyl substituted methylcyclopolysilanes (R,R'=Me, Ph) which can be used for further functionalization of the silicon rings.It also provides several new sterically hindered methylcyclopolysilanes (R,R'=Ph, Ph; Me, t-Bu) which could not be synthesized by the conventional demethylation routes.These products have all been isolated and characterized by their ultraviolet, 1H-, 13C- and 29Si-NMR spectra.
