DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Hyoseok | ko |
dc.contributor.author | Choi, Yoon Jeong | ko |
dc.contributor.author | Lee, Yoon Sup | ko |
dc.date.accessioned | 2013-03-07T18:03:19Z | - |
dc.date.available | 2013-03-07T18:03:19Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2008-12 | - |
dc.identifier.citation | JOURNAL OF PHYSICAL CHEMISTRY B, v.112, no.50, pp.16021 - 16029 | - |
dc.identifier.issn | 1520-6106 | - |
dc.identifier.uri | http://hdl.handle.net/10203/90857 | - |
dc.description.abstract | Structures and vibrational frequencies of group 17 fluorides EF3 (E = I, At, and element 117) are calculated at the density functional theory (DFT) level of theory using relativistic effective core potentials (RECPs) with and without spin-orbit terms in order to investigate the effects of spin-orbit interactions and electron correlations on the structures and vibrational frequencies of EF3. Various tests imply that spin-orbit and electron correlation effects estimated presently from Hartree-Fock (HF) and DFT calculations with RECPs with and without spin-orbit terms are quite reasonable. Spin-orbit and electron correlation effects generally increase bond lengths and/or angles in both C-2v and D-3h structures. For IF3, the C-2v structure is a global minimum, and the D-3h structure is a second-order saddle point in both HF and DFT calculations with and without spin-orbit interactions. Spin-orbit effects for IF3 are negligible in comparison to electron correlation effects. The D-3h global minimum is the only minimum structure for (117)F-3 in all RECP calculations, and the C-2v structure is neither a local minimum nor a saddle point. In the case of AtF3, the C-2v structure is found to be a local minimum in all RECP calculations without spin-orbit terms, and the D-3v structure becomes a local minimum at the DFT level of theory with and without spin-orbit interactions. In the HF calculation with spin-orbit terms, the D-3h structure of AtF3 is a second-order saddle point. AtF3 is a borderline case between the valence-shell-electron-pair-repulsion (VSEPR) structure of IF3 and the non-VSEPR structure of (117)F-3. Relativistic effects, including scalar relativistic and spin-orbit effects, and electron correlation effects together or separately stabilize the D-3h structures more than the C-2v structures. As a result, one may suggest that the VSEPR predictions agree very well with the structures optimized by the nonrelativistic HF level of theory even for heavy-atom molecules but not so well with those from more elaborate theoretical methods. Vibrational frequencies of AtF3 and (117)F-3 are modified substantially and nonadditively by spin-orbit and electron correlation contributions. This is one of those rare cases for which vibrational frequencies of the closed-shell molecules are significantly affected by spin-orbit interactions. Spin-orbit interactions decrease all vibrational frequencies of EF3 molecules considered. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | EFFECTIVE CORE POTENTIALS | - |
dc.subject | RELATIVISTIC EFFECTIVE POTENTIALS | - |
dc.subject | CORRELATION-ENERGY | - |
dc.subject | DENSITY | - |
dc.subject | THERMOCHEMISTRY | - |
dc.subject | MOLECULES | - |
dc.subject | EXCHANGE | - |
dc.subject | HYDROGEN | - |
dc.subject | MODEL | - |
dc.subject | ATOMS | - |
dc.title | Spin-Orbit and Electron Correlation Effects on the Structure of EF(3) (E = I, At, and Element 117) | - |
dc.type | Article | - |
dc.identifier.wosid | 000261652900009 | - |
dc.identifier.scopusid | 2-s2.0-58149234204 | - |
dc.type.rims | ART | - |
dc.citation.volume | 112 | - |
dc.citation.issue | 50 | - |
dc.citation.beginningpage | 16021 | - |
dc.citation.endingpage | 16029 | - |
dc.citation.publicationname | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.identifier.doi | 10.1021/jp8056306 | - |
dc.contributor.localauthor | Lee, Yoon Sup | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | EFFECTIVE CORE POTENTIALS | - |
dc.subject.keywordPlus | RELATIVISTIC EFFECTIVE POTENTIALS | - |
dc.subject.keywordPlus | CORRELATION-ENERGY | - |
dc.subject.keywordPlus | DENSITY | - |
dc.subject.keywordPlus | EXCHANGE | - |
dc.subject.keywordPlus | THERMOCHEMISTRY | - |
dc.subject.keywordPlus | APPROXIMATION | - |
dc.subject.keywordPlus | MOLECULES | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordPlus | MODEL | - |
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