Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Steric strain versus hyperconjugative stabilization in ethane congeners.

Lingchun Song1, Yuchun Lin, Wei Wu

  • 1Department of Chemistry, State Key Laboratory of Physical Chemistry of Solid Surfaces, Center for Theoretical Chemistry, Xiamen University, Xiamen, Fujian 361005, P. R. China.

The Journal of Physical Chemistry. A
|July 15, 2006
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Identification of imidazo[1,2-a]pyridine-3-amine as a novel drug-like scaffold for efficious ferroptosis inhibition in vivo.

European journal of medicinal chemistry·2025
Same author

How does ferrocene correlate with ferroptosis? Multiple approaches to explore ferrocene-appended GPX4 inhibitors as anticancer agents.

Chemical science·2024
Same author

The discovery of novel imidazo[1,2-<i>a</i>]pyridine derivatives as covalent anticancer agents.

Organic & biomolecular chemistry·2024
Same author

Deciphering the Diversified Metabolic Behavior of Hydroxyalkyl Ferrocidiphenols as Anticancer Complexes.

Journal of medicinal chemistry·2023
Same author

Synthesis and bioactivity evaluation of ferrocene-based hydroxamic acids as selective histone deacetylase 6 inhibitors.

European journal of medicinal chemistry·2022
Same author

Origins of Rotational Barriers in Hydrogen Peroxide and Hydrazine.

Journal of chemical theory and computation·2015
Same journal

Stability of Some Ternary 13-Atom Icosahedral Clusters Assessed with Geometric, Electronic, and Thermodynamic Criteria.

The journal of physical chemistry. A·2026
Same journal

A Three-Phase Distribution Method for Quantifying the Intermolecular Interactions.

The journal of physical chemistry. A·2026
Same journal

Cooperative Effects in the Inverse Coordination Complexes of Aromatic Azines and Tin(IV) Halides.

The journal of physical chemistry. A·2026
Same journal

The Infrared Spectra of Neutral Dimethyl-Sulfide, -Disulfide and -Sulfoxide Biomarkers in Molecular Beams.

The journal of physical chemistry. A·2026
Same journal

Photoinduced Charge-Transfer Suppresses Triplet Formation Efficiency in Thiocoumarins: Evidence from Ultrafast Spectroscopy and Theoretical Calculations.

The journal of physical chemistry. A·2026
Same journal

Porphyrin Aggregation Revisited: From the Four-Orbital Gouterman Model to an Eight-Orbital Framework in Porphin H-Dimers.

The journal of physical chemistry. A·2026
See all related articles

Rotation barriers in Group IVB ethane congeners are primarily governed by steric repulsion, with hyperconjugation playing a secondary role. This mechanism holds true for both rigid and relaxed rotations, highlighting the dominance of steric effects.

Area of Science:

  • Computational Chemistry
  • Quantum Chemistry
  • Molecular Modeling

Background:

  • Understanding rotational barriers is crucial for predicting molecular conformations and reactivity.
  • Ethane congeners in Group IVB (C, Si, Ge, Sn, Pb) offer a unique system to study trends in bonding and steric effects.
  • Ab initio valence bond theory provides a robust framework for dissecting electronic and steric contributions to molecular properties.

Purpose of the Study:

  • To systematically investigate and elucidate the rotation barriers in Group IVB ethane congeners (H(3)X-YH(3)).
  • To differentiate and quantify the contributions of steric strain and hyperconjugation to these rotational barriers.
  • To determine the underlying mechanism governing rotation in these systems.

Main Methods:

Related Experiment Videos

  • Utilizing ab initio valence bond (VB) theory for systematic electronic structure calculations.
  • Decomposing rotation barriers into independent steric and hyperconjugative components.
  • Analyzing the influence of central X-Y bond relaxation on rotational barriers.

    • Main Results:

    • Steric repulsion was identified as the dominant factor controlling rotation barriers across all studied Group IVB ethane congeners.
    • Hyperconjugative interactions, favoring staggered conformations, were found to play a secondary but significant role.
    • Independent estimations revealed that central X-Y bond relaxation contributes minimally to the overall rotational barriers.

    Conclusions:

    • The primary mechanism governing rotation barriers in Group IVB ethane congeners is conventional steric repulsion.
    • Both rigid and fully relaxed rotation models consistently demonstrate the dominance of steric effects.
    • Hyperconjugation influences conformation but does not dictate the primary energy barrier to rotation.