Accession Number:

ADA492748

Title:

The Thermal Decomposition of 2-Ethyldecaborane

Descriptive Note:

Corporate Author:

EXPLOSIVES RESEARCH AND DEVELOPMENT ESTABLISHMENT WALTHAM ABBEY (UNITED KINGDOM)

Personal Author(s):

Report Date:

1962-10-31

Pagination or Media Count:

18.0

Abstract:

The kinetics of the thermal decomposition of 2-ethyldecaborane have been investigated for a static system in the temperature range 210 deg - 230 deg C and at 2-ethyldecaborane pressures of 100 - 600 mm Hg. The decomposition leads initially to decaborane and diethyldecaboranes, its rate is of the second order with respect to 2-ethyldecaborane the activation energy is 39.5 - 0.5 koalmole. In the later stages of the decomposition the reaction deviates from the second order dependence due to side reactions which give nonvolatile solid hydrides, alkylated nonvolatile solid hydrides, hydrogen, methane and a little ethane. 1,2-diethyldecaborane is always present in the products in greater concentration than 2,4-diethyldecaborane. This and other results have been interpreted in terms of a hyperconjugation effect of the alkyl group with the a B-B bonds in the decaborane structure.

Subject Categories:

  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE