Di-<i>tert</i>-butyldichlorosilane , >95.0%(GC) , 18395-90-9

Synonym(s):
DTBSCl₂

CAS NO.：18395-90-9

Empirical Formula: C8H18Cl2Si

Molecular Weight: 213.22

MDL number: MFCD00008796

EINECS: 242-273-0

PRODUCT 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
• solubility: sol most common organic solvents.
• form: liquid
• Specific Gravity: 1.009
• color: Colorless to Light yellow
• Hydrolytic Sensitivity: 8: reacts rapidly with moisture, water, protic solvents
• Sensitive: Moisture Sensitive
• BRN: 1739236
• CAS DataBase Reference: 18395-90-9(CAS DataBase Reference)
• EPA Substance Registry System: Silane, dichlorobis(1,1-dimethylethyl)- (18395-90-9)

Description and Uses

The presence of the bulky t-butyl groups in di-t-butyldichlorosilane has been found to increase the Si–C bond lengths slightly and to widen the CSiC bond angles by 11.1? relative to dichlorodimethylsilane as determined by electron diffraction and molecular mechanics calculations.
The di-t-butylsilylene protecting group for diols was introduced by Trost and Caldwell and used in a total synthesis of deoxypillaromycinone.It is introduced by the reaction of di-tbutyldichlorosilane with a 1,2- or 1,3-diol in acetonitrile in the presence of triethylamine and 1-hydroxybenzotriazole (HOBt) at 45–90°C (eq 1). For a related, highly reactive reagent see di-t-butylsilyl Bis(trifluoromethanesulfonate).

Safety

• Symbol(GHS): GHS05
• Signal word: Danger
• Hazard statements: H314
• Precautionary statements: P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363-P405
• Hazard Codes: C
• Risk Statements: 34-37
• Safety Statements: 26-36/37/39-45
• RIDADR: UN 2987 8/PG 2
• WGK Germany: 3
• F: 10-21
• TSCA: No
• HazardClass: 8
• PackingGroup: II
• HS Code: 29319090