|
|||||
|
|
Mechanism of the Catalytic Activity of Nucleophiles in the Stepwise Hydrolysis and Condensation Reactions of Tetramethoxysilane |
|
| Authors: | Igor S. Ignatyev Prof. Manuel Montejo Dr. Juan Jesús López González Dr. |
| Affiliation: | 1. Department of Chemistry, Radiochemistry Laboratory, St. Petersburg State University, 199034 St. Petersburg (Russia);2. Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Ed. B‐3, 23071 Jaén (Spain), Fax: (+34)?95212940 |
| Abstract: | Active ingredients : A model for the simplest hydrolysis reaction is applied to all stages of stepwise hydrolysis and condensation taking place during a sol–gel process. The picture shows the molecular structures of the transition states of the ammonia‐ (left) and OH?‐promoted (right) condensation reactions of two Si(OH)4 molecules, including an additional water molecule.  |
| Keywords: | density functional calculations hydrolysis nucleophilic catalysts reaction mechanisms sol– gel processes |