Silanols

Silanols are derivatives of silanes in which one or more hydroxyl groups are bonded to a silicon atom. They are the silicon analogues of the alcohols. The simplest representative is hydroxysilane with the formula H ₃ Si-OH. If the molecule also contains one or more organic residues, it is an organosilanol .

Silanols are often made by the hydrolysis of halosilanes .

${\displaystyle \mathrm {H_{3}SiCl+\ H_{2}O\ {\xrightarrow[{}]{}}\ H_{3}SiOH\ +\ HCl} }$

They are often not stable and often react spontaneously with elimination of water to form siloxanes . How hydroxysilane dimerizes rapidly to disiloxane :

${\displaystyle \mathrm {2\ H_{3}SiOH\ {\xrightarrow[{}]{}}\ H_{3}Si{-}O{-}SiH_{3}\ +\ H_{2}O} }$

literature

• Jacek Nawrocki: The silanol group and its role in liquid chromatography. In: Journal of Chromatography A . 779, 1997, pp. 29-71, doi : 10.1016 / S0021-9673 (97) 00479-2 .

Individual evidence

1. ↑ ^{a b} Ralf Steudel : Chemistry of non-metals: From structure and bond to application . Walter de Gruyter, 2008, ISBN 3-11-021128-9 , p. 288 ( limited preview in Google Book search).