The Photodissociation of Acetylene at 193.3 NM.
Abstract
We have measured the translational energy release for processes I and II using the Molecular Beam Time-of-Flight method: (I)-C2H2 in the 193 nm range yields C2H + H; (II)-C2H in the 193nm range yields C2 + H. By measuring the maximum release of transitional energy for process I it has been determined that the C-H bond energy in acetylene, D sub o(C2H-H) is 132 + or - 2 Kcal/Mol. Since the translational energy distribution peaks well away from zero, it is quite unlikely that internal conversion of the electronically excited C2H2 is an important channel for dissociation in product rotation, it is possible to get information on the vibrational structure of C2H radical from the translational energy distribution and it is found that the bending frequency in C2H is 550 + or - 100/cm. Our experiment is consistent with earlier work on fluorescence. Originator supplied keywords include: Photofragmentation translation spectrometer; Molecular beams; Unimolecular decay; Photochemistry; Photodissociation; Bond energy; Acetylene; Ethynyl radical.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 21, 1985
- Accession Number
- ADA155775
Entities
People
- A. M. Wodtke
- Y. T. Lee
Organizations
- University of California, Berkeley