Photodissociation of bromine azide

Article abstract of DOI:10.1063/1.445565

Bromine azide was photodissociated by using excimer laser sources at 222 and 308 nm.The primary fragments produced are N2(A ³Σ_u⁺) and NBr(X ³Σ^-), with some N2(B ³Π_g) produced at 222 nm.In contrast to analogous experiments with ClN3, NBr(b ¹Σ⁺) was not observed.From the formation of these products, it is concluded that the heat of formation of BrN3 is greater than 122 kcal/mol.The N2(A ³Σ_u⁺) produced by photodissociation decays by a combination of pseudo-first order and second order processes.The first order process is reaction with the parent BrN3, generating N2(B ³Π_g) as a product.The rate constant for N2(A ³Σ_u⁺) quenching by BrN3 is 1,2 +/- 0,2*10^-12 cm³ molecule^-1 s^-1.This first order process dominates for photolysis at 222 nm.The second order process involves reaction of N2(A ³Σ_u⁺) with another photodissociation fragment, and produces intense emission in the vicinity of 292 nm.This emission has been tentatively identified as the D'(³Π2_g) -> A'(³Π2_u) transition in Br2.The second order process is much more important in the decay of N2(A³Σ_u⁺) produced by photolysis at 308 nm.

Full text of DOI:10.1063/1.445565

Photodissociation of bromine azide
R. D. Coombe
Citation: The Journal of Chemical Physics 79, 254 (1983); doi: 10.1063/1.445565
View online: http://dx.doi.org/10.1063/1.445565
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/79/1?ver=pdfcov
Published by the AIP Publishing
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