N,N-Bis(halomethyldimethylsilyl)acetamides and their reactions |
| |
Authors: | J. Kowalski Z. Lasocki |
| |
Affiliation: | Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-362 Lód? Poland;Institute of Polymers, Technical University, 90-924 Lód? Poland |
| |
Abstract: | N,N-Bis(halomethyldimethydimethylsilyl)acetamides, MeCON(SiMe2CH2X)2, (X = Cl, Br) were prepared by transsilylation of N,O-bis(trimethylsilyl)acetamide with halomethyldimethylchlorosilane. With water and methanol, instead of the expected SiN cleavage, nucleophilic substitution of halogen took place and the products were 1-acetyl-2,2,6,6-tetramethyldisilamorpholine and N,N-bismethoxymethyldimethylsilyl)acetamide respectively. These compounds were shown by IR and 1H NMR spectra to have the N,N-disilylacetamide structure. Thermodynamic, kinetic constants of hindered rotation around the CN bond in these compounds were determined from their temperature-variable 1H NMR spectra. The main products of thermolysis of the silylamides are α,ω-dichloropolydimethylsiloxanes and polydimethylcyclosiloxanes. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|