Ab initio calculations at the [QCISD(T)/6-31 +G(Zdf, p)]//MP2/6-31G(d) level have been applied to CH$CH200, a radical which is thought to be important in the atmospheric oxidation of dimethylsulfide. The geometries of CH3SCH200 and the related CI-ISSCH20 radical are similar to other organic radicals
A photoelectron and ab initio study of the CH3SCH2 radical
β Scribed by J. Baker; J.M. Dyke
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 398 KB
- Volume
- 213
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
A new partially structured photoelectron band appearing early in the F+CH,SCH, reaction has been assigned to the primary reaction product, CHpSCH2. This band, with adiabatic and vertical ionisation energies of 6.85 kO.03 and 7.16+0.03 eV, respectively, shows structure in two vibrational modes, with o,=870f 70 cm-' and w2= 390+ 100 cm-', which can be assigned to the S%CHZ stretch and the C-S-C deformation modes of the ion. These assignments are consistent with the results of ab initio calculations conducted at the SCF and MP2 levels.
π SIMILAR VOLUMES
By means of a geometry optimization at the MP2/6-3 lG(d) level, the CH302 radicals have been found to exist in five isomeric forms. In order of decreasing stabilities, they are: HO-CH-OH ( ) > 0-CH,-OH (2) > CH&-0 (3) > CH2-O-OH (4) > CHI OH-O (5). On the other hand, there are six CHpO$ isomers: HO-
## Abstract Thermal motion of CH is investigated by performing an __ab initio__ molecular dynamics method with the secondβorder MΓΈllerβPlesset (MP2)/6β311G\*\* force field. In the trajectories obtained at 400 K, we have observed rapid interconversion behavior of the geometrical parameters of CH wit
The equilibrium structures, vibrational spectra, and heats of formation for CH OCl and CH ClO have been estimated using high levels of ab initio molecular 3 3 orbital theory. The lowest energy isomer is found to be CH OCl, and its heat of 3 formation is estimated to be y13.5 " 2 kcal mol y1 , in goo
The kinetics of the title reactions were investigated in a discharge flow tube by using laser magnetic resonance detection of HO2. The upper limits for the bimolecular rate constants for the reactions of HO2 with H2S ( k l ) , CH3SH (k2), and CH3SCH3 ( k 3 ) are <3 X <4 X and <5 X cm3 molecule-l s-l