Variationally exact vibrational energies are reported for non-rotating Hz0 and DzO using the recent CCSDT-1 ab initio potential of Bartlett, Cole, Purvis, Ermler, Hsieh and Shavitt as tit to an SPF quartic force field by Ermler. Twenty vibrational states are calculated for H20 and D20 and compared w
An ab initio calculation of symmetric bending and stretching vibrational states of the H3O+ and D3O+ ions
β Scribed by Norihiro Shida; Kiyoshi Tanaka; Kimio Ohno
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 303 KB
- Volume
- 104
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Calculations are reported for the symmetric bending and stretching vibrational states of H30f and D30' including coupling between these two modes. The calculations were carried out by using a potential surface calculated by the SCT Cl method and expressed in terms of symmetric internal coordinates_ The transition energy of the uz(l--03 inversion mode is found to be 985 cm-', which is comparable to the experimental value of 954.417 cm-l observed by Haese and Oks.
The calculated inversion doubling of the lowest state is 51 cm-'.
π SIMILAR VOLUMES
Ab-initio computations at 298.15 K were made of the activation quantities AH\*, AS\*, and AG\* and of the reaction quantities AH r and AS r for is the transition state (TS). GAUSS-IAN92 was used and energies computed at a slightly modified Gaussian-2 level. Two potential surfaces for the TS had sym
Ab initio SCF calculations at the 3-2 I G\* and 6-3 1 G\* HF-SCF level were performed on LiCIOs and NaClOs. Tridentate, bidentate and monodentate coordination models were examined and the bidentate and tridentate structures were characterized as the two lowest-energy minima on the corresponding pote
The heats of formation of the trifluoromethanol (CFrOH) and carbonic difluoride (CFrO) molecules are calculated with theoretical methods of demonstrated high accuracy. The results are used to assess the accuracy of the reported value of the heat of formation of CF,O and to provide an accurate estima
Resul& for the wbralional frequencws of H\_T and D: are calculated usmg the polen~~al zurraces or Burlon van Nagy-Felsobuki Doherty and Hamlhon (BVDH) and DyI.s~a and Swope (DS) The vL rundamenlal rrrquencles rrom these polenuals Car H\_z are 2519 29 and 2521 62 cm-' respectwely (exp 2521 6 cm-') Fo