Structure of (O→Si)-(acetoxymethyl)trifluorosilane in three phase states and in solutions View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2011-12

AUTHORS

N. N. Chipanina, T. N. Aksamentova, G. A. Gavrilova, L. P. Oznobikhina, N. F. Lazareva

ABSTRACT

According to the IR spectroscopy data, the molecules of (O→Si)-(acetoxymethyl)trifluorosilane having in the liquid state and in polar media the intramolecular bond C=O→Si, exist in the gas phase in the temperature range 438–538 K in the equilibrium with the molecules with tetracoordinate silicon atom. This allowed to determine experimentally the enthalpy of formation of the intramolecular bond C=O→Si for the gas phase to be ΔH = 2.2±0.1 kcal mol−1. In the solid state at 110 K and in the CS2 solution, along with molecule with the C=O→Si bond, the dimers exist, which include both tetra- and pentacoordinate silicon atom. The data of quantum-chemical calculations (B3LYP/6-311G**) show that the shortest intermolecular bond Si-F→Si is realized in the associate formed by the molecules in the ap,sp- and sp,sp-forms, and the longest one, when both components are in the sp,sp-forms. More... »

PAGES

2440-2449

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s107036321112005x

DOI

http://dx.doi.org/10.1134/s107036321112005x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1029641879


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