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DC Field | Value | Language |
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dc.creator | Silva, Daniela Rodrigues | - |
dc.creator | Santos, Lucas de Azevedo | - |
dc.creator | Hamlin, Trevor A. | - |
dc.creator | Bickelhaupt, F. Matthias | - |
dc.creator | Freitas, Matheus P. | - |
dc.creator | Guerra, Célia Fonseca | - |
dc.date.accessioned | 2022-01-06T15:46:08Z | - |
dc.date.available | 2022-01-06T15:46:08Z | - |
dc.date.issued | 2021-09-01 | - |
dc.identifier.citation | SILVA, D. R. et al. Dipolar repulsion in α-halocarbonyl compounds revisited. Physical Chemistry Chemical Physics, [S.l.], v. 23, p. 20883-20891, Sept. 2021. DOI: 10.1039/d1cp02502c. | pt_BR |
dc.identifier.uri | http://repositorio.ufla.br/jspui/handle/1/48796 | - |
dc.description.abstract | The concept of dipolar repulsion has been widely used to explain several phenomena in organic chemistry, including the conformational preferences of carbonyl compounds. This model, in which atoms and bonds are viewed as point charges and dipole moment vectors, respectively, is however oversimplified. To provide a causal model rooted in quantitative molecular orbital theory, we have analyzed the rotational isomerism of haloacetaldehydes OHC–CH2X (X = F, Cl, Br, I), using relativistic density functional theory. We have found that the overall trend in the rotational energy profiles is set by the combined effects of Pauli repulsion (introducing a barrier around gauche that separates minima at syn and anti), orbital interactions (which can pull the anti minimum towards anticlinal to maximize hyperconjugation), and electrostatic interactions. Only for X = F, not for X = Cl–I, electrostatic interactions push the preference from syn to anti. Our bonding analyses show how this trend is related to the compact nature of F versus the more diffuse nature of the heavier halogens. | pt_BR |
dc.language | en_US | pt_BR |
dc.publisher | Royal Society of Chemistry | pt_BR |
dc.rights | acesso aberto | pt_BR |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
dc.source | Physical Chemistry Chemical Physics | pt_BR |
dc.subject | Rotational energy profiles | pt_BR |
dc.subject | Orbital interactions | pt_BR |
dc.subject | Electrostatic interactions | pt_BR |
dc.title | Dipolar repulsion in α-halocarbonyl compounds revisited | pt_BR |
dc.type | Artigo | pt_BR |
Appears in Collections: | DQI - Artigos publicados em periódicos |
Files in This Item:
File | Description | Size | Format | |
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ARTIGO_Dipolar repulsion in α-halocarbonyl compounds revisited.pdf | 3,73 MB | Adobe PDF | View/Open |
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