The Cl to NCl branching ratio in 248-nm photolysis of chlorine azide

The primary reaction products from 248-nm chlorine azide photolysis are identified in a collision-free experiment. In contrast to all previous reports, the radical channel producing Cl + N3 (95 � 3%) is seen to dominate the photochemistry. The molecular channel producing NCl + N2 (5 � 3%) was also observed. 2004 Elsevier B.V. All rights reserved.