78393-15-4Relevant academic research and scientific papers
THE CRYSTAL STRUCTURE OF DI-t-BUTYLSILANEDIOL AND ITS RELEVANCE TO THE LIQUID CRYSTALLINITY OF DIISOBUTYLSILANEDIOL
Buttrus, N. H.,Eaborn, C.,Hitchcock, P. B.,Saxena, A. K.
, p. 291 - 298 (1985)
The crystal structure of t-Bu2Si(OH)2 consist of hydrogen-bonded dimers linked by futher hydrogen bonding into (distorted) ladder chains, the type of structure previously postulated for solid i-Bu2Si(OH)2 to account for its ability to give a liquid crystal on heating.The six-membered rings of the dimers have a chair conformation with adjacent chairs inverted with respect to one another.The structure of the ladder chains is similar to that in t-Bu2Ge(OH)2, but the packings of the chains in the crystal are different.
Rate increases in the fluorination of bulky chlorosilanes caused by ultrasound or by water
Lickiss, Paul D.,Lucas, Ronan
, p. 167 - 172 (2007/10/03)
The conversion of bulky chlorosilanes to fluorosilanes under anhydrous conditions with hexafluorosilicate salts is accelerated by ultrasound. The fluorination of sterically hindered chlorosilanes such as tBuPh2SiCl, in the absence of ultrasound, is greatly accelerated by the addition of water to the reaction mixture.
Stepwise Synthesis of Chain and Ring Siloxanes - Crystal Structures
Graalmann, Onno,Klingebiel, Uwe,Clegg, William,Haase, Martin,Sheldrick, George M.
, p. 2988 - 2997 (2007/10/02)
Disilanols of the type R2Si(OH)2 (1, 2: R = CHMe2, CMe3) and the fluorosilanol (Me3C)2Si(OH)F (3) serve as starting materials in the reaction with halosilanes for the stepwise construction of chain siloxanes (4 - 15, 16 - 20).Even siloxanes with bulky tert-butyl or silylamino groups are easily prepared (10, 16, 17, 20).Crystalline silanediols (2, 14, 19) are connected in chains (19) or dimeric rings (2, 14) by hydrogen bonding.The 1,3-difluoro- (18), 1,3-dihydroxy- (19), and 1-fluoro-3-hydroxydisiloxane 6 as well as the cyclotrisiloxane 21 were isolated from the reaction of F2Si(CHMe2)2 with potassium hydroxide.Directed synthesis of Si-O six-membered rings (21 - 24) is possible via reaction of 1,3-dihydroxydisiloxanes 19, 20 with di- and trihalosilanes.The crystal structures of 2, 14, and 24 are discussed.
