Disiloxane

Structural formula
General
Surname	Disiloxane
other names	Disilyl ether
Molecular formula	H 6 OSi 2
Brief description	colorless and odorless gas
External identifiers / databases
CAS number 13597-73-4 PubChem 123318 Wikidata Q2675470
properties
Molar mass	78.22 g mol −1
Physical state	gaseous
density	3.491 kg m −3
Melting point	−144 ° C
boiling point	−15.2 ° C
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Disiloxane is a chemical compound from the group of siloxanes .

Extraction and presentation

Disiloxane can be obtained by reacting monobromosilane , monochlorosilane or monoiodosilane with airless ice . Hydroxysilane is formed as an intermediate .

${\displaystyle \mathrm {SiH_{3}Br+\ \ H_{2}O\longrightarrow SiH_{3}OH+\ HBr} }$

${\displaystyle \mathrm {2\ SiH_{3}OH\longrightarrow H_{3}Si{-}O{-}SiH_{3}+\ H_{2}O} }$

properties

Disiloxane is a colorless, odorless gas that does not spontaneously ignite in air, which decomposes very slowly with water. It is stable at room temperature and only decomposes rapidly above 400 ° C. With caustic soda it immediately develops hydrogen . In the solid state, it has an orthorhombic crystal structure with the space group P 2 ₁ 2 ₁ 2 ₁ (space group no. 19) .

Individual evidence

1. ↑ ^{a b c d e f} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 690.
2. ^ ^{A b} Jean d 'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 734 ( limited preview in Google Book search).
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.