81633-92-3

Basic information

• Product Name: Disilane, 1,1,1,2-tetramethyl-
• CAS NO: 81633-92-3
• Molecular Formula: C4H14Si2
• Molecular Weight: 118.326
• Mol File: 81633-92-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Disilane, 1,1,1,2-tetramethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Disilane, 1,1,1,2-tetramethyl-(81633-92-3)
• EPA Substance Registry System: Disilane, 1,1,1,2-tetramethyl-(81633-92-3)

Safety Data

• Hazardous Substances Data: 81633-92-3(Hazardous Substances Data)

Upstream product

• 4342-61-4 1,2-dichlorotetramethylsilane 
• 13528-88-6 1,1,2-trichloro-1,2,2-trimethyldisilane 
• 4518-98-3 1,1,2,2-tetrachloro-1,2-dimethyldisilane 
• 4518-99-4 1,1-dichlorotetramethyldisilane 

Downstream Products

• 1184807-61-1 Pt(1,2-bis(diphenylphosphino)ethane)(H)(SiHMeSiMe₃) 

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.