D atom loss in the photodissociation of the DNCN radical: implications for prompt NO formation.
The photodissociation of DNCN following excitation of the C 2A"<--X 2A" electronic transition was studied using fast beam photofragment translational spectroscopy. Analysis of the time-of-flight distributions reveals a photodissociation channel leading to D+NCN competitive with the previously observed CD+N2 product channel. The translational energy distributions describing the D+NCN channel are peaked at low energy, consistent with internal conversion to the ground state followed by statistical decay and the absence of an exit barrier. The results suggest a relatively facile pathway for the reaction CH+N2-->H+NCN that proceeds through the HNCN intermediate and support a recently proposed mechanism for prompt NO production in flames.
Szpunar
David E
DE
Department of Chemistry, University of California, Berkeley, California 94720, USA.
Faulhaber
Ann Elise
AE
Kautzman
Kathryn E
KE
Crider
Paul E
PE
Neumark
Daniel M
DM