Rate and mechanism of thermal decomposition of 4-methyl-l-pentyne in a single-pulse shock tube

TLDR: In this paper, a single-pulse burst tube was used to pyrolyze 4-methyl-l-pentyne in a singlepulse shock tube and the decomposition process involved bond breaking and molecular reaction.

Abstract: Dilute mixtures of 4-methyl-l-pentyne have been pyrolyzed in a single-pulse shock tube. The decomposition process involves bond breaking: as well as a molecular reaction: The rate parameters are: The heat of formation of propynyl radical is thus ΔHf300 = 338 kJ mol−1 (80.7 kcal mol−1)˙ This leads to a propynyl resonance energy of 40 kJ mol−1 (9.6 kcal mol−1).