20328-93-2Relevant academic research and scientific papers
Photodissociation dynamics of the singlet and triplet states of the NCN radical
Bise, Ryan T.,Choi, Hyeon,Neumark, Daniel M.
, p. 4923 - 4932 (1999)
The spectroscopy and photodissociation dynamics of the NCN radical have been investigated by fast beam photofragment translational spectroscopy. The B3∑u-←X 3∑g-, c1Πu,←a1Δ g, and d1Δu ←-a1Δg transitions were examined. The major dissociation products for the B3∑u- and c1Πu states are N2(X1∑g+) + C(3P), while the d1Δu state dissociates to N2(X1∑g-+)+ C(1D). The dissociation channel, N(4S) + CN(X2∑1) is observed for the B3∑u- state at photon energies greater than 4.9 eV, where it comprises ≈25±10% of the total signal. At all photon energies, the photofragment translational energy distributions show a resolved progression corresponding to the vibrational excitation of the N2 photofragment. The rotational distributions of the molecular fragments suggest that the dissociation pathway for the N2 loss channel involves a bent transition state while the N+CN photofragments are produced via a linear dissociation mechanism. The P(ET) distributions provide bond dissociation energies of 2.54±0.030 and 4.56±0.040 eV for the N2 and CN loss channels, respectively, yielding ΔHf,0 K(NCN)=4.83±0.030 eV.
