Cascade cocondensation of trifunctional chloro- and alkoxysilanes RSiX3 in nonaqueous media

The hydrolytic copolycondensation (HPC) of trifunctional monomers RSiX 3 (R = Ph, Me; X are hydrolyzable RO or Cl groups) in nonaqueous organic solvents (toluene, dioxane) was studied. The in situ generation of water necessary for hydrolysis occurred via the reaction of carbamide with acetone or ace...

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Bibliographic Details
Published inRussian chemical bulletin Vol. 68; no. 1; pp. 125 - 131
Main Authors Trankina, E. S., Zavin, B. G., Chogovadze, E. G., Polshchikova, N. V., Kondrashova, A. A., Ikonnikov, N. S.
Format Journal Article
LanguageEnglish
Published New York Springer US 2019
Springer Nature B.V
Subjects
Acetone
Acetylacetone
Alkoxysilanes
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Full Articles
Inorganic Chemistry
Mass spectrometry
Molecular weight
NMR
Nuclear magnetic resonance
Organic Chemistry
Toluene
trifunctional monomers
branched cascade synthesis
organosilsesquioxanes
trichloromethylsilane
hydrolytic polycondensation
trichlorophenylsilane
triethoxymethylsilane
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Summary:The hydrolytic copolycondensation (HPC) of trifunctional monomers RSiX 3 (R = Ph, Me; X are hydrolyzable RO or Cl groups) in nonaqueous organic solvents (toluene, dioxane) was studied. The in situ generation of water necessary for hydrolysis occurred via the reaction of carbamide with acetone or acetylacetone. The cascade synthesis of silsesquioxanes was carried out under the conditions of in situ water generation in nonaqueous media with the quantitative yield of organochloro- and alkoxysilanes from the reaction mixtures. The influence of the conditions of cascade HPC on the compositions, structures, and molecular weight characteristics of the obtained products was studied by GPC, 1 H and 29 Si NMR, and GC coupled with mass spectrometry.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-019-2427-1