ISSN:
1573-8353
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The dependence of the strain energy on the distance between the nitrogen and silicon atoms was studied for the 1-methyl-2-carbasilatrane molecule within the framework of the Westheimer method. For models with the postulated silicon coordination numbers of 5 and 4, respectively, Si...N distances of 2.31 Å (19.4 kcal/mole) and 2.41 Å (32.4 kcal/mole) correspond to the minimum of the conformational energy of the endo form. The exo form is the most stable when the distance between the Si and N atoms is 3.10 A, and it is also the least strained system (1.8 kcal/mole). Since 1-methy1-2-carbasilitrane exists only in the endo form, the stability of the latter can be justified only under the condition that the energy of the transannular Si←N interaction exceeds 17.6 kcal/mole.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00945593
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