Direct measurement of methylene removal rates by species containing the OH functional group

Abstract

The technique of laser flash photolysis/laser absorption has been used to obtain absolute removal rate constants for singlet methylene (1CH2) with N2, ketene (CH2CO), H2O, D2O, methanol (CH3OH), ethanol (C2H5OH), and n-propanol (n-C3H7OH) at 296 ± 2 K. The rate constants were found to be (0.130 ± 0.012), (2.38 ± 0.18), (1.60 ± 0.17), (1.05 ± 0.13), (2.20 ± 0.19), (2.61 ± 0.23) and (4.15 ± 0.44)× 10–10 cm3 molecule–1 s–1, respectively. The removal rate constants for the alcohols are consistently greater than those for the corresponding alkanes.