The enrichment factor of carbon-13 m the products of multiphoton dissociation of CzFsCl has been investigated asa function of CO&xer wavelength and fluence. Pressure effects have been studied both on the pure sample and in the presence of several additives (He, Xe, 02. Hz. NO, 12). Dissociation of 1
Intramolecular isotope effect in laser multiphoton dissociation of CH2DCH2Cl
โ Scribed by A.J. Colussi; S.W. Benson; R.J. Hwang; J.J. Tiee
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 488 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The ratio r = [lICl]/[ DCI], for the decomposition of ethyl Wt chloride, CH2DCII2CI, induced by mtcn\c CO2 h\cr ~UIIIS, has been mummd under dlffcrcnt cxperimcntal condition. Changes in be;ml cncrgy, bc;mr peomctry. rohtlon,ll he% irradiatton tanc and pressure have no discernible cffcct 01' r. It is hewn tht .I nxrow distributmn with an avcrapc excess energy of I:'; = 15 5 2 photons (35-46 kcal/tuolc) and KRKM theory arc mutually consiFtcnt w1t11 the ohcrvcd value of r = 2.6 f 0.1. 'll~ implications of these results for the mcchamsm of multiphoton ab\orptlon are analyxd.
๐ SIMILAR VOLUMES
Angular-resolved kinetic energy distributions of fragments resulting from dissociation induced by intense, short, linearly polarized laser pulses are calculated using an accurate three-dimensional Fourier transform method in spherical coordinates. The rotational excitation of the molecule leads, in
The shape of the 1265 cix@ absorption btind in liquid C&C12 ch;u?ges on dilution with &e deuterated compound. This is discussed in terms of intermdeculv vibrational refaxxtior. The important influexe of molecular reorientaliox on ~ribrational relaxation is pointed out.
An analysis of thermochemical and kinetic data on the bromination of the halomethanes CH, ,X,, (X = F, C1, Br; n = 1-31, the two chlorofluoromethanes, CH,FCI and CHFCl,, and CH,, shaws that the recently reported heats of formation of the radicals CH2C1, CHClz, CHBr2, and CFC12, and the C-H bond diss
A number of lines from a CO2 TEA laser were used to photolyze CF2C12. Enrichment of the 35C1 and "Cl isotopes in the molecular chlorine formed durmg the photolysis was observed using a mass spectrometer. Maximum enrichment was about 1.8. The dependence of enrichment on wavelength, reactant concentra
CH(A \*A-X %) emission was observed following multiple photon dissociation of ketene with an ArF laser. For rotational levels with N' from 14 to 19 the symmetric A component of the emission had higher intensity than the antisymmetric and the opposite was observed for levels with N' between 20 and 23