18143-93-6

Basic information

• Product Name: 1,3,5-triethyl-1-chlorocyclotrisiloxane
• CAS NO: 18143-93-6
• Molecular Weight: 256.909
• Mol File: 18143-93-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,3,5-triethyl-1-chlorocyclotrisiloxane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3,5-triethyl-1-chlorocyclotrisiloxane(18143-93-6)
• EPA Substance Registry System: 1,3,5-triethyl-1-chlorocyclotrisiloxane(18143-93-6)

Safety Data

• Hazardous Substances Data: 18143-93-6(Hazardous Substances Data)

Upstream product

• 1789-58-8 ethyldichlorosilane 

Relevant articles and documents

Unexpected reactions of dichloro(ethyl)silane with DMSO in organic solvents

The effect of the solvent nature on the composition of the products formed upon the reaction between EtSi(H)Cl2 and DMSO (molar ratio 1: 1, 0 °C) was revealed. This reaction in non-polar and low polar solvents (toluene, chloroform) gives oligoethyl(hydro)cyclo-siloxanes ((EtSi(H)O)n, n = 3—8) as the major products in the yields up to 77%. In MeCN, oligoethyl(hydro)cyclosiloxanes are formed along with cyclic monochlorinated siloxanes ((EtSi(H)O)n(EtSi(Cl)O), n = 2—7) in a ratio of ~7: 3 (68: 29 wt.%). In excess diethyl ether, the overall yield of oligoethyl(hydro)cyclosiloxanes does not exceed 25% and the major products are linear α,ω-diethoxyoligoethyl(hydro)siloxanes (EtO(EtSi(H)O)nEt, n = 2—7) formed in 70—75% yields. A plausible reaction mechanism leading to the final products was suggested. Apparently, the reaction proceeds via ethyl(hydro)-and chloro(ethyl)silanones as intermediates.