Laser Kinetic Spectroscopy of Unimolecular and Bimolecular Processes in the Gas Phase.
Abstract
This research is concerned with the study of unimolecular processes in the gas phase. We concentrated on simple bond fission reactions, and determined both the collision free unimolecular rates Benzylamine (C6H5CH2NH2), Nitrosomethane (CH3)3CNO), and the energy disposal in the products Nitrosyl cyanide (NCN0), Trifluoronitrile methane (CF3CN), Cyanogeniodide (ICN). Most of the molecules were dissociated either via IRMPD(CF3CN, C6H5CH2NH2) or by electronic excitation followed by radiationless transitions (NCNO(CH3)3CNO). They exhibited statistical behavior, and the results were compared with the predictions of statistical theories. The most detailed experiments involved the photodissociation of NCNO, which provided complete mapping. of product internal states. The CN and NO E,V,R distributions are textbook examples of statistical product state distributions deriving from a unimolecular reaction. In our studies of the direct photodissociation of ICN, we obtained sub-Doppler LIF spectra of nascent CN(X2 sigmat state), following the 266 nm photolysis of 300 K molecules. These studies provided a detailed picture of the fragment recoil spatial anisotropies as well as CN E,V,R, T and and I/I excitations. The CN rotational distributions were dissected into two separate distributions for the channels producing I and I.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1985
- Accession Number
- ADA166998
Entities
People
- Curt Wittig
- Hanna Reisler
Organizations
- University of Southern California