Self-heating in the decomposition of 3-methyl-3-chlorodiazirine: determination of reaction exothermicity and correction of arrhenius parameters
Abstract
The gas-phase decomposition of 3-methyl-3-chlorodiazirine(I) has been re-investigated using direct measurement of the reactant gas temperature to demonstrate the occurrence of self-heating during reaction. In addition, the thermal conductivity of (I) has been measured at 298 and 348 K. From these data ΔH°f(I) is determined as 55.6 ± 9.5 kcal mol–1 and a significant error in the earlier measurement of the Arrhenius parameters for the low pressure decomposition reaction is corrected.