Dichloro (methyl) silane

Structural formula
General
Surname	Dichloro (methyl) silane
other names	Dichloromethylsilane; Methylhydrogendichlorosilane; Methyldichlorosilane; MDCS;
Molecular formula	CH 4 Cl 2 Si
Brief description	highly flammable, colorless liquid with a pungent odor
External identifiers / databases
EC number	200-877-1
ECHA InfoCard	100,000,798
PubChem	6327386
ChemSpider	4885894
Wikidata	Q1209408
properties
Molar mass	115.03 g mol −1
Physical state	liquid
density	1.1 g cm −3
Melting point	−91 ° C
boiling point	41 ° C
Vapor pressure	471 h Pa (20 ° C); 690 hPa (30 ° C); 983 hPa (40 ° C);
solubility	violent decomposition in water
safety instructions
H and P phrases	H: 225-261-301 + 331-314
	EUH: 014-071
	P: 210-231 + 232-261-280-301 + 310-422
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Dichloro (methyl) silane is an organosilicon compound from the group of silanes that plays an important role in the manufacture of silicone rubber .

Extraction and presentation

Dichloro (methyl) silane can be obtained by hydrosilylation of alkenes and alkynes and contact with metallochloride compounds.

properties

Dichloro (methyl) silane is a highly flammable, colorless liquid with a pungent odor and belongs to the group of halogenated organic silanes . According to Antoine, the vapor pressure function results from ln (P) = A− (B / (T + C)) (P in bar, T in K) with A = 4.17332, B = 1179 and C = −31 in the temperature range of 275 to 314 K. It forms highly flammable vapor-air mixtures. The compound has a flash point of −32 ° C. The explosion range is between 2.4 vol.% As the lower explosion limit (LEL) and 55 vol.% As the upper explosion limit (UEL). The ignition temperature is above 316 ° C. The substance therefore falls into temperature class T2.

use

Dichloro (methyl) silane is an intermediate product in the synthesis of silicone rubbers and functionalized organosilanes.

safety instructions

Dichloro (methyl) silane reacts violently with water. When burned or heated, it decomposes into toxic substances (including phosgene ).

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Entry on dichloromethylsilane in the GESTIS substance database of the IFA , accessed on February 15, 2018(JavaScript required) .
↑ Jenkins, AC; Chambers, GF: Vapor Pressures of Silicon Compounds in Ind. Eng. Chem. 46 (1954) 2367-2369, doi : 10.1021 / ie50539a043 .

[Gestis-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Entry on dichloromethylsilane in the GESTIS substance database of the IFA , accessed on February 15, 2018(JavaScript required) .

[Jenkins-2] Jenkins, AC; Chambers, GF: Vapor Pressures of Silicon Compounds in Ind. Eng. Chem. 46 (1954) 2367-2369, doi : 10.1021 / ie50539a043 .