The 16-valence-electron A-B-C species, containing sulphur and second-row elements are screened for unknown systems at Hartree-Fock and M$ler-Plesset levels. The possible new species include the trivial, but unknown SBS-, SBO-or SNO+, the high-energy thiofulminate SNC-, and the neon-containing series
Ab initio study of bonding trends among the 22-electron ABA systems: Evidence for OOO2+
✍ Scribed by Pekka Pyykkö
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 273 KB
- Volume
- 156
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
HF/6-31G* calculations of bond lengths and vibrational frequencies are reported for the isoelectronic species CCC?-, NBN3to NFN+, OBeO'-to 0002+ and FBeF to FNF '+. Systematic trends are found as function of the central nuclear charge. The calculated R, and W, at this level are found to agree with experimental values for anions in crystals. The new gas-phase species 0002+ and FNF3* are predicted. Correlated calculations (MP2-MP4, CISD) are reported for O=O-02+.
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The ab initio electronic structure calculations at the MP2 and the Becke Ž . 3LYP density functional levels in conjunction with the 6-311qqG 2 df, 2 pd basis set were used for the determination of the structure, vibrational spectra, and dissociation 2q 2q Ž . energies of the XH and XH X s C, Si, Ge