Rate constants for the deactivation of N(22D) by simple hydride and deuteride molecules

Rate constants for the deactivation of N(2D) by H2, H2O, CH4, C2H6, C3H8, NO and their deuterated isotopomers were determined. C–H bonds of methane isotopomers, CHnD4−n (n=0–4), are 1.7 times more reactive than C–D bonds. A similar isotope effect is observed between O–H and O–D bonds of H2O and D2O. The rate constants for C2H6 and C3H8 are much larger than that for CH4. These rate constants are in agreement with results on the branching ratios of hydride and deuteride products.