DI-TERT-BUTYLDICHLOROSILANE CAS#: 18395-90-9

DI-TERT-BUTYLDICHLOROSILANE

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DI-TERT-BUTYLDICHLOROSILANE Basic information

DI-TERT-BUTYLDICHLOROSILANE Chemical Properties

Melting point:−15 °C(lit.)
Boiling point:190 °C729 mm Hg(lit.)
Density 1.009 g/mL at 25 °C(lit.)
refractive index n20/D 1.457(lit.)
Flash point:143 °F
storage temp. 2-8°C
form liquid
Specific Gravity1.009
Hydrolytic Sensitivity8: reacts rapidly with moisture, water, protic solvents
Sensitive Moisture Sensitive
BRN 1739236
CAS DataBase Reference18395-90-9(CAS DataBase Reference)
EPA Substance Registry SystemSilane, dichlorobis(1,1-dimethylethyl)- (18395-90-9)

Safety Information

MSDS

DI-TERT-BUTYLDICHLOROSILANE Usage And Synthesis

Purification MethodsPurify it by fractional distillation. 20 1.01. It is a colourless liquid with a pleasant odour and does not fume in moist air, but does not titrate quantitatively with excess of dilute alkali. [Tyler et al. J Am Chem Soc 70 2877 1948.] Di -tert-butyl silyl bis(trifluoromethanesulfonate) [85272 -31 -7] M 440.5, b 73.5 -7 4 . 5o/0.35mm, d 4 Purify it by fractional distillation at high vacuum. 20 1.36 (see pK for triflic acid). It is a pale yellow liquid which should be stored under argon. It is less reactive than the diisopropyl analogue. The presence of the intermediate monochloro compound can be detected by 1H NMR, (CHCl3): tert-Bu2Si(OTf)2 [ 1.25s], but impurities have 1.12s for tert-Bu2Si(H)OTf and 1.19s for tert-Bu2HSi(Cl)OTf. [Deslongchamps Tetrahedron Lett 23 4871 1982, Deslongchamps Aldrichimica Acta 17 72 1984.] TOXIC.

DI-TERT-BUTYLDICHLOROSILANE Preparation Products And Raw materials

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