DFT Calculated Structures and IR Spectra of the Conformers of para-Bromocalix[4]aryl Derivatives
Molecular structures of the various conformers of para-bromocalix[4]aryl derivatives 1-4 were optimized using the DFT B3LYP calculation method. The total electronic and Gibbs free energies and normal vibrational frequencies of the different structures (CONE, partial cone (PACO), 1,2-Alternate(1,2-A)...
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Published in | Bulletin of the Korean Chemical Society Vol. 35; no. 12; pp. 3514 - 3520 |
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Main Authors | , , |
Format | Journal Article |
Language | Korean |
Published |
2014
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Subjects | |
Online Access | Get full text |
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Summary: | Molecular structures of the various conformers of para-bromocalix[4]aryl derivatives 1-4 were optimized using the DFT B3LYP calculation method. The total electronic and Gibbs free energies and normal vibrational frequencies of the different structures (CONE, partial cone (PACO), 1,2-Alternate(1,2-A) and 1,3-Alternate(1,3-A)) were calculated from the four kinds of para-bromocalix[4]aryl derivatives. The B3LYP/6-31G(d,p) calculations suggested the following: 1(PACO) is the most stable among four conformers of 1; 2(CONE) is the most stable among five conformers of 2; 3(PACO) is the most stable among four conformers of 3; 4(1,3-A) is the most stable among four conformers of 4. All the most stable structures optimized by the B3LYP calculation method were in accordance with the experimental crystal structures of 1-4. The calculated IR spectra of the various conformers (CONE, PACO, 1,2-A and 1,3-A) of 1-4 were compared. |
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Bibliography: | KISTI1.1003/JNL.JAKO201436438765314 |
ISSN: | 0253-2964 1229-5949 |