KINETICS OF CHLORINE OXIDE REACTIONS .2. REACTION OF NITROGEN ATOMS WITH CL20

The reaction was studied mass spectrometrically in a fast-flow system at pressures near 0.3 torr. Final reaction products were N2, O2, and Cl2. The ratio of Cl2O to N consumed at long reaction times was 0.93 ± 0.10 with a fivefold excess of Cl2O. No nitric oxide was found as a product. The results are interpreted in terms of the following sequences of reactions: (1) N + Cl2O → NCl + ClO; (2) N + NCl → N2 + Cl; (3) N + ClO → NCl + O; (4) O + Cl2O → 2ClO; (5) O + ClO → O2 + Cl; (6) Cl + Cl2O → Cl2 + ClO; (7) Cl + wall → 1/2Cl2; (8) 2ClO → Cl2 + O2, where we find that k1 = (9.1 ± 1.5) × 1011 cm3 mol-1 sec-1.