Dimethyldichlorosilane

Dimethyldichlorosilane is a tetrahedral organosilicon compound with the formula Si(CH3)2Cl2. At room temperature it is a colorless liquid that readily reacts with water to form both linear and cyclic Si-O chains. Dimethyldichlorosilane is made on an industrial scale as the principal precursor to dimethylsilicone and polysilane compounds.

Dimethyldichlorosilane
Names
Preferred IUPAC name
Dichlorodi(methyl)silane
Other names
Dichlorodimethylsilane, dichlorodimethylsilicon, dimethylsilicon dichloride, dimethylsilane dichloride, DMDCS
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.000.820
EC Number
  • 200-901-0
RTECS number
  • VV3150000
UNII
UN number 1162
  • InChI=1S/C2H6Cl2Si/c1-5(2,3)4/h1-2H3 Y
    Key: LIKFHECYJZWXFJ-UHFFFAOYSA-N Y
  • InChI=1/C2H6Cl2Si/c1-5(2,3)4/h1-2H3
    Key: LIKFHECYJZWXFJ-UHFFFAOYAT
  • C[Si](C)(Cl)Cl
Properties
C2H6Cl2Si
Molar mass 129.06 g·mol−1
Appearance Colorless liquid
Density 1.07 g·cm−3 (l)
Melting point −76 °C (−105 °F; 197 K)
Boiling point 70 °C (158 °F; 343 K)
Decomposes
Hazards
GHS labelling:
Danger
H225, H315, H319, H335
P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P403+P235, P405, P501
Flash point −9 °C (16 °F; 264 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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