Gaseous ClNCO exhibits a continuous ultraviolet absorption feature peaked near 250 nm. Photolysis of this compound at 249 nm produces bright blue emission identified as the A 2Σ+→ X 2Π transition in NCO. The excited NCO arises from a collisional process in which N (2 D) atoms, produced directly by the photodissociation, react with the parent ClNCO. The rate constant for this process is k=(2.1±0.2)× 10− 11 cm3 s− 1. From production of N (2 D) ...
