18236-87-8

Basic information

• Product Name: isobutyldichlorosilane
• Synonyms: isobutyldichlorosilane
• CAS NO: 18236-87-8
• Molecular Formula: C₄H₁₀Cl₂Si
• Molecular Weight: 157.11
• Mol File: 18236-87-8.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 120-125°C
• Flash Point: 10°C (50°F)
• Appearance: /
• Refractive Index: 1.4270
• CAS DataBase Reference: isobutyldichlorosilane(CAS DataBase Reference)
• NIST Chemistry Reference: isobutyldichlorosilane(18236-87-8)
• EPA Substance Registry System: isobutyldichlorosilane(18236-87-8)

Safety Data

• Hazardous Substances Data: 18236-87-8(Hazardous Substances Data)

Usage

General Description

Isobutyldichlorosilane is a colorless, flammable liquid with a pungent odor that is used primarily as a precursor in the production of silicone and other organosilicon compounds. It is a chlorosilane compound, containing both chlorine and silicon atoms, and is highly reactive with water, forming hydrogen chloride and silanols. Isobutyldichlorosilane is used in various industrial applications, including in the manufacturing of adhesives, sealants, and coatings, as well as in the production of specialty chemicals and pharmaceuticals. It is important to handle isobutyldichlorosilane with caution, as it is a hazardous chemical that can cause irritation to the skin, eyes, and respiratory system upon contact or inhalation.

Upstream product

• 513-36-0 isobutyryl chloride 

Downstream Products

• 18169-57-8 isobutyltrichlorosilane 
• 18165-87-2 isobutylsilane 

Relevant articles and documents

Direct synthesis of organodichlorosilanes by the reaction of metallic silicon, hydrogen chloride and alkene/alkyne and by the reaction of metallic silicon and alkyl chloride

Dichloroethylsilane was synthesized by the reaction of metallic silicon, hydrogen chloride and ethylene using copper(I) chloride as the catalyst, the silicon conversion and the selectivity for dichloroethylsilane being 36 and 47%, respectively. At a lower reaction temperature or at a higher ratio of ethylene: hydrogen chloride a higher selectivity was obtained, however the silicon conversion was lower. The silicon-carbon bond formation is caused by the reaction of a surface silylene intermediate with ethylene. The reaction with propylene in place of ethylene gave dichloroisopropylsilane (22% selectivity) and dichloro-n-propyl-silane (8% selectivity) together with chlorosilanes. A part of the dichloroisopropylsilane is formed by the reaction of silicon, hydrogen chloride and isopropyl chloride formed by hydrochlorination of propylene. Use of acetylene instead of alkenes resulted in dichlorovinylsilane formation with a 34% selectivity. Alkyldichlorosilanes were also produced directly from silicon with alkyl chlorides, propyl and butyl chlorides. During the reaction the alkyl chloride is dehydrochlorinated over the surface of copper originating from the catalyst to afford hydrogen chloride and alkene. The hydrogen chloride formed participates in the formation of the silicon-hydrogen bond in alkyldichlorosilane, and the reaction of silicon, hydrogen chloride and alkene also causes alkyldichlorosilane formation. The reaction with isopropyl chloride gave a very high selectivity (85%) for dichloroisopropylsilane, the silicon conversion being 86%. The Royal Society of Chemistry 2001.