18163-84-3

Basic information

• Product Name: Bis(dimethylsilyl)methane
• Synonyms: 2,4-Dimethyl-2,4-disilapentane;Bis(dimethylsilyl)methane;Methylenebis(dimethylsilane)
• CAS NO: 18163-84-3
• Molecular Formula: C₅H₁₆Si₂
• Molecular Weight: 0
• Mol File: 18163-84-3.mol

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Bis(dimethylsilyl)methane(CAS DataBase Reference)
• NIST Chemistry Reference: Bis(dimethylsilyl)methane(18163-84-3)
• EPA Substance Registry System: Bis(dimethylsilyl)methane(18163-84-3)

Safety Data

• Hazardous Substances Data: 18163-84-3(Hazardous Substances Data)

Upstream product

• 2117-28-4 bis(trimethylsilyl)methane 
• 13683-11-9 trimethylsilyl(dimethylchlorosilyl)methane 
• 5357-38-0 bis(chlorodimethylsilyl)methane 
• 4519-04-4 dichloro[(chlorodimethylsilyl)methyl]methylsilane 
• 4519-03-3 bis(methyldichlorosilyl)methane 

Downstream Products

• 17887-25-1 Si,Si'-diethoxy-Si,Si,Si',Si'-tetramethyl-Si,Si'-methanediyl-bis-silane 
• 75-54-7 Dichloromethylsilane 
• 5357-38-0 bis(chlorodimethylsilyl)methane 

Relevant articles and documents

Disilane Cleavage with Selected Alkali and Alkaline Earth Metal Salts

The industry-scale production of methylchloromonosilanes in the Müller–Rochow Direct Process is accompanied by the formation of a residue, the direct process residue (DPR), comprised of disilanes MenSi2Cl6-n (n=1–6). Great research efforts have been devoted to the recycling of these disilanes into monosilanes to allow reintroduction into the siloxane production chain. In this work, disilane cleavage by using alkali and alkaline earth metal salts is reported. The reaction with metal hydrides, in particular lithium hydride (LiH), leads to efficient reduction of chlorine containing disilanes but also induces disproportionation into mono- and oligosilanes. Alkali and alkaline earth chlorides, formed in the course of the reduction, specifically induce disproportionation of highly chlorinated disilanes, whereas highly methylated disilanes (n>3) remain unreacted. Nearly quantitative DPR conversion into monosilanes was achieved by using concentrated HCl/ether solutions in the presence of lithium chloride.

METHODS AND APPARATUS FOR FORMING GASEOUS ORGANOSILICON COMPOUNDS

The present application is directed to a method for producing, from a solid organosilane compound, a mixture of gaseous organosilicon compounds having a desired molar ratio, the method comprising the step of pyrolysing the solid organosilane while maintaining a predetermined pressure which is selected to provide the desired molar ratio of gaseous organosilicon compounds. Associated apparatus and control mechanisms are also disclosed.