Rotational and translational energy distributions of CN(v=0,J) from the hot atom reactions : H + XCN {yields} HX + CN(v=0,J), where X = Br, C1, and CN.
The dynamics of the reactions of translationally energetic H atoms with BrCN, ClCN, and (CN){sub 2} was studied by determining both the rotational state distribution and the translational energy disposition of the CN product ground vibrational level. The reaction was carried out using H atoms with a most probable translational energy of 92 kJ mol{sup -1}. The CN radical was monitored by time- and frequency-resolved absorption spectroscopy using the CN red system (A {sup 2}{Pi} {l_arrow} X {sup 2}{Sigma}) (2,0) band near 790 nm. Sub-Doppler resolution spectroscopy was used to determine the initial translational temperature of the CN(0,J) product. The fraction of the available reaction exothermicity that appeared as CN(0) rotational energy, f{sub R}, for H + XCN {yields} HX + CN was 0.034{+-}0.006, 0.061{+-}0.02, and 0.13{+-}0.007, for X = Br, Cl, and CN, respectively. Likewise, the fraction of the available reaction exothermicity that appeared as relative product translational energy, f{sub T}, was 0.52{+-}0.25, 0.52{+-}0.20, and 0.59{+-}0.05, for X = Br, Cl, and CN, respectively. The absolute reaction cross sections for the H + XCN {yields} HX + CN reactions were also measured to be 0.03, 0.02, and 0.3 x 10{sup -16} cm{sup 2} for X = Br, Cl, and CN, respectively.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 942726
- Report Number(s):
- ANL/CHM/JA-34019; JCPSA6; TRN: US200922%%630
- Journal Information:
- J. Chem. Phys., Vol. 112, Issue 15 ; Apr. 15, 2000; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- ENGLISH
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