Methylsilane

Structural formula
Wedges to clarify the spatial structure
General
Surname	Methylsilane
other names	Monomethylsilane
Molecular formula	CH 6 Si
Brief description	colorless gas with a foul odor
External identifiers / databases
CAS number 992-94-9 EC number 213-598-5 ECHA InfoCard 100.012.362 PubChem 70434 Wikidata Q978572
properties
Molar mass	46.14 g mol −1
Physical state	gaseous
density	2.076 kg / m³ 0.628 g / cm³ (liquid, at −57.5 ° C)
Melting point	−156.8 ° C
boiling point	−57.5 ° C
Vapor pressure	13.043 bar (20 ° C) 16.5 bar (30 ° C) 25.2 bar (50 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 220-280 P: 210-280-410 + 403
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Methylsilane is a chemical compound from the group of organosilicon compounds .

presentation

Methylsilane can be produced in quantitative yield by reacting monochlorosilane with an excess of dimethylzinc .

${\displaystyle \mathrm {SiH_{3}Cl+\ Zn(CH_{3})_{2}\ {\xrightarrow[{}]{}}\ Si(CH_{3})H_{3}\ +\ ClZnCH_{3}} }$

properties

Methylsilane is an extremely flammable, colorless gas ( flash point ≤ −30 ° C) with a disgusting odor. It is heavier than air ( relative gas density = 1.606) and forms explosive mixtures with air (lower explosion limit at 1.3 % by volume or 25 g m ⁻³ , upper explosion limit at 88.9% by volume or 1735 g · m ⁻³ ) and can self-ignite in air. It decomposes when heated.

use

Methylsilane is used in chemical gas phase epitaxy (VPE) of germanium - doped silicon carbide layers (Ge: SiC).

Related links

• Dimethylsilane
• Trimethylsilane
• Tetramethylsilane

Individual evidence

1. ↑ ^{a b c d e f g h i j} entry to methylsilane in the GESTIS database of IFA , retrieved on July 2, 2018(JavaScript required) .
2. ↑ Data sheet methylsilanes from Sigma-Aldrich , accessed on July 22, 2014 ( PDF ).
3. ^ Alfred Stock, Carl Somieski: Siliciumwasserstoffe VI .: Chlorination and methylation of the monosilane . In: Reports of the German Chemical Society (A and B Series) . tape 52 , no. 4 , April 12, 1919, p. 695 , doi : 10.1002 / cber.19190520410 .
4. ↑ Airliquide: Methylsilane