Rate constants and branching ratios have been measured for the reaction of with over the temperature range from 500 to 1400 K. The rate constants increase dramatically over this temperature range, in good agreement with a previous study from our laboratory. A complex chemistry was found. The main product at low temperature, disappears almost completely at high temperature, in part due to thermal dissociation. The main products at high temperature are and the latter ion has not been observed previously. Also prominent at high temperature are and A small amount of is observed at all temperatures. is observed in small quantities at high temperature. Branching ratios for the reaction of with are also reported, confirming the ion assignments. Comparison to drift tube and beam results indicates that vibrational excitation of the promotes several of these channels more than other forms of energy. Channels which proceed through the intermediate (described in the accompanying paper) are probably not strongly dependent on the form of energy, although uncertainties prevent a definitive conclusion. The charge-transfer channel and the channels requiring substantial rearrangement are greatly enhanced by vibrational excitation. Thus, specific channels do appear to be governed by vibrational excitation.
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8 April 2001
Research Article|
April 08 2001
Kinetics of the reaction of with from 500 to 1400 K: A case for state specific chemistry
Itzhak Dotan;
Itzhak Dotan
Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom AFB, Massachusetts 01731-3010
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A. A. Viggiano
A. A. Viggiano
Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom AFB, Massachusetts 01731-3010
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J. Chem. Phys. 114, 6112–6118 (2001)
Article history
Received:
September 01 2000
Accepted:
January 09 2001
Connected Content
A companion article has been published:
Ab initio investigation of the potential energy profiles for the gas phase reaction system
Citation
Itzhak Dotan, A. A. Viggiano; Kinetics of the reaction of with from 500 to 1400 K: A case for state specific chemistry. J. Chem. Phys. 8 April 2001; 114 (14): 6112–6118. https://doi.org/10.1063/1.1352033
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