K. Sato et al., Measurements of thermal rate constants for the reactions of N(D-2,P-2) with C2H4 and C2D4 between 225 and 292 K, J PHYS CH A, 103(43), 1999, pp. 8650-8656
The thermal rate constants for the reactions of electronically excited nitr
ogen atoms, N(D-2) and N(P-2), With C2H4 and C2D4 have been measured by usi
ng a pulse radiolysis-atomic absorption method between 225 and 292 K. From
the results of the kinetic isotope effect for the N(2D) reaction, a main re
action mechanism was assigned to be the N addition to the double bond. This
conclusion is in accordance with the prediction of our previous ab initio
calculations. Variational transition-state theory calculations were perform
ed for the N(2D) reaction by using the results of ab initio molecular orbit
al calculations. It was suggested that correction of the "multiple surface
coefficient" is necessary to interpret the measured rate constants, The rat
io of the rate constant of N(D-2) to that of N(P-2) was found to be close t
o unity and was much smaller than those for the reactions with H-2 and CH4
The deactivation process of N(P-2) was determined to be the spin-allowed qu
enching process, N(P-2) + C2H4(S-0) --> N(S-4) + C2H4(T-1).