18132-64-4Relevant academic research and scientific papers
Alcoholysis Equilibria of Dialkoxydimethylsilanes Catalyzed by Iodine or Iodine Monobromide
Ito, Katsuko,Ibaraki, Takeshi
, p. 295 - 297 (2007/10/02)
Iodine or iodine monobromide was found to be an especially favorable catalyst for the study of the alcoholysis equilibria of dialkoxydimethylsilanes by gas chromatography.Iodine monobromide was employed to promote the reactions associated with tertiary alcohols, and iodine was used for the other reactions.Eight alcohols were allowed to react with diethoxydimethylsilane, and successive equilibrium constants, K1 and K2, were determined at 20 deg C.K1=2.36-2.75 and K2=0.66-0.69 (by the use of primary alcohols), K1=1.34-1.38 and K2=0.28-0.30 (secondary alcohols), and K1=0.15-0.16 (tertiary alcohols) were observed.These values express precisely the difference of reactivities of the three groups of alcohols with diethoxydimethylsilane.Out of the dialkoxydimethylsilanes used in this study, eight unreported compounds were isolated and characterized.
The Disproportionation of Dimethyldialkoxysilanes Catalyzed by Iodine Monobromide
Ibaraki, Takeshi,Ito, Katsuko
, p. 3235 - 3236 (2007/10/02)
Iodine monobromide is an extremely effective catalyst for the redistribution of alkoxyl groups on silicon atoms in dimethyldialkoxysilanes.The equilibrium constants of these reactions were determined at 40 deg C by means of gas chromatography.Assuming that the reaction intermediate is the dative form of a dimethyldialkoxysilaneiodine monobromide complex, a mechanism of the reaction was proposed.
