Reagent orbital alignment effect in chemiluminescence reactions Ca(P-1(1))+CH3X (X = Cl, I)

Reagent orbital alignment effects in chemiluminescence reactions Ca(P-1(1)) + CH3X (X = Cl, I) are studied in a beam-gas apparatus. Stronger alignment dependence is found in the reaction Ca(P-1(1)) + CH3CI. For an ideal case, a simple expression is derived to calculate the reagent alignment sensitiv ity factor. This analysis shows that the primary reasons for the different alignment dependence between Ca(P-1(1)) + CH3CI and Ca(P-1(1)) + CH3I lie i n two facts: one is the larger reaction radius for the latter reaction, and the other is the larger potential splitting V-Pi-V-Sigma for the former re action.