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Related Concept Videos

DNA Base Pairing02:27

DNA Base Pairing

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
DNA Base Pairing02:27

DNA Base Pairing

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
VSEPR Theory and the Effect of Lone Pairs04:01

VSEPR Theory and the Effect of Lone Pairs

Effect of Lone Pairs of Electrons on Molecule Geometry
Structure of Benzene: Molecular Orbital Model01:18

Structure of Benzene: Molecular Orbital Model

According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
NMR Spectroscopy of Benzene Derivatives01:37

NMR Spectroscopy of Benzene Derivatives

Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling constants depend...

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Related Experiment Video

Updated: Jul 9, 2026

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters
10:52

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Florobenzene as artificial nucleobases-base pairing and stacking interactions.

Aleksandra Zivkovic1, Joachim W Engels

  • 1Institute for Organic Chemistry and Chemical Biology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany.

Nucleosides, Nucleotides & Nucleic Acids
|December 11, 2007
PubMed
Summary

Base stacking interactions are complex, influenced by electrostatic and dispersion forces. This study correlates stacking and solvation with lipophilicity, fluorine substitution, and dipole moment to better understand these molecular forces.

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Area of Science:

  • * Molecular interactions and supramolecular chemistry.
  • * Computational chemistry and physical organic chemistry.

Background:

  • * Base stacking is a critical interaction in biological systems and materials science.
  • * Existing models struggle to fully explain the interplay of electrostatic, dispersion, and solvation forces in base stacking.
  • * Previous attempts to correlate stacking contributions with molecular properties showed no clear trends.

Purpose of the Study:

  • * To investigate the relationship between base stacking and solvation contributions with specific molecular descriptors.
  • * To explore the influence of lipophilicity, fluorine substitution, and dipole moment on base stacking phenomena.
  • * To identify potential correlations that can enhance the predictive understanding of molecular interactions.

Main Methods:

  • * Computational analysis of base stacking interactions.
  • * Correlation analysis using molecular descriptors such as lipophilicity, fluorine content, and dipole moment.
  • * Evaluation of electrostatic, dispersion, and solvation contributions to stacking energy.

Main Results:

  • * Quantitative correlations between stacking/solvation and molecular properties were explored.
  • * The study assessed the impact of varying fluorine substitution levels on stacking behavior.
  • * Dipole moment and lipophilicity were examined as potential predictive factors for stacking strength.

Conclusions:

  • * Understanding base stacking requires considering multiple contributing factors.
  • * Lipophilicity, fluorine substitution, and dipole moment offer avenues for predicting stacking behavior.
  • * Further research can refine models of molecular interactions by incorporating these correlations.