Reaction of active nitrogen with SO2 and SOCl2

The reactions of active nitrogen with SO2 and SOCl2 have been studied on a flowing afterglow apparatus. The emissions ranging from 280 to 500 ran were assigned to SO2 ((A) over tilde (1)A(2), (B) over tilde B-1(1)->(X) over tilde (1)A(1)) and SO2((a) over tildeB(1)->(X) over tilde (1)A(1)). With the aim to discerning the roles of active N atom and N-2(A(3)Sigma(+)(u)) played in the reactions above, N-2(A(3)Sigma(+)(u)) generated by Ar(P-3(0.2)) reacting with N-2 has substituted the active nitrogen to react with SO2 and SOCl2, respectively. It shows that when reacting with SO2, both the active nitrogen and N-2(A(3)Sigma(+)(u)) without N atom can produce SO2 ((A) over tildeA(2), (B) over tilde B-1(1)) and SO2 ((a) over tilde B-3(1)); while reacting with SOCl2, only when N-2(A(3)Sigma(+)(a)) and the active N atoms coexist, could SO2 ((a) over tilde B-3(1)) be formed. Therefore, it is concluded that N-2(A(3)Sigma(+)(u)) dominates the reaction of active nitrogen with SO2 and makes SO2 excited directly; N-2((a) over tilde B-3(1)) and active N atom reacting with SoCl(2) can generate the constitutions to form SO2 ((a) over tilde B-3(1)), which were suggested as N2O (X-1 Sigma(+)) and SO(X).