Unexpected reactions of dichloro(ethyl)silane with DMSO in organic solvents
- Authors: Basenko S.V.1, Maylyan A.A.1
- 
							Affiliations: 
							- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
 
- Issue: Vol 66, No 5 (2017)
- Pages: 903-907
- Section: Full Articles
- URL: https://journals.rcsi.science/1066-5285/article/view/240617
- DOI: https://doi.org/10.1007/s11172-017-1827-3
- ID: 240617
Cite item
Abstract
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.
About the authors
S. V. Basenko
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
							Author for correspondence.
							Email: sv_basenko@irioch.irk.ru
				                					                																			                												                	Russian Federation, 							1 ul. Favorskogo, Irkutsk, 664033						
A. A. Maylyan
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
														Email: sv_basenko@irioch.irk.ru
				                					                																			                												                	Russian Federation, 							1 ul. Favorskogo, Irkutsk, 664033						
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