Rate of the reaction of atomic hydrogen with propyne over an extended pressure and temperature range

The technique of flash photolysis coupled with time resolved detection of H via resonance fluorescence has been used to obtain rate constants for the reaction of atomic hydrogen with propyne at temperatures from 215 to 460 K and at pressures in the range 5–600 torr. The rate constants are strongly pressure dependent and the high pressure limiting values give rise to the Arrhenius expression k= (6.00±1.20) ×10−11 exp(−2450±100/1.987 T) cm3 molecule−1⋅s−1. The results are discussed and compared with those of previous studies.