The Gauche Effect in XCH2CH2X Revisited - Rodrigues Silva
2021年2月8日 · The gauche effect refers to the phenomenon that the gauche conformer is energetically favored for X = F while, in all other cases (X = Cl, Br, I), the preferred conformer is anti. The current model ascribes the gauche effect to hyperconjugative orbital interactions that favor gauche in case of X = F.
The Gauche Effect in XCH2CH2X Revisited - PMC - PubMed …
The gauche effect refers to the phenomenon that the gauche conformer is energetically favored for X = F while, in all other cases (X = Cl, Br, I), the preferred conformer is anti. The current model ascribes the gauche effect to hyperconjugative orbital …
3.3: Conformations of Substituted Hydrocarbons
2022年9月16日 · We have said that for straight chain or branched hydrocarbons, the most stable conformation will be staggered and preferably antiperiplanar (if not, at least minimizing gauche interactions). This is due primarily to three principles: torsional strain, …
How can the gauche-effect be explained? - Chemistry Stack …
2015年10月16日 · The gauche effect, as a special form of hyperconjugation, relies us on looking at how these molecular orbitals can (or cannot) interact with each other.
The Gauche Effect - Chemistry School
In this arrangement form there are influences, known as the Gauche effect, that give it a lower energy. In an anti-periplanar relationship there can be an alignment of a carbon/hydrogen bonding orbital and a carbon/hydrogen anti-bonding orbital.
A new twist on molecular shape | Nature
2001年5月31日 · The dihedral twisting angle, φ, is defined as the angle between a specific pair of opposing C–H bonds (asterisks), shown here in the gauche conformation.
Fluorine Gauche Effect Explained by Electrostatic Polarization …
We present an interacting quantum atoms (IQA) study of the gauche effect by comparing 1,2-difluoroethane, 1,2-dichloroethane, and three conformers of 1,2,3,4,5,6-hexafluorocyclohexane.
The Gauche Effect in XCH2CH2X Revisited - ResearchGate
2021年2月8日 · The gauche effect refers to the phenomenon that the gauche conformer is energetically favored for X = Fw hile, in all other cases (X = Cl, Br, I), the preferred conformer is anti.
Gauche Effect in 1,2-Difluoroethane. Hyperconjugation, Bent …
2005年1月26日 · Fluorine Gauche Effect Explained by Electrostatic Polarization Instead of Hyperconjugation: An Interacting Quantum Atoms (IQA) and Relative Energy Gradient (REG) Study. The Journal of Physical Chemistry A 2018 , 122 (5) , 1439-1450.
The Fluorine Gauche Effect: A Brief History - Thiehoff - 2017
2016年9月20日 · Intimately related to the anomeric effect, the gauche effect is ubiquitous in stereoelectronic theory. The reinforcing combination of two σ C−H →σ C−F * interactions necessarily leads to the characteristic syn-clinal conformation …
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