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Intermolecular Forces03:13

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Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
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Intermolecular potential energy surface between Ne and NO (2Pir).

Yoshihiro Sumiyoshi1, Yasuki Endo

  • 1Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan.

The Journal of Physical Chemistry. A
|December 30, 2009
PubMed
Summary

High-resolution microwave spectroscopy revealed details of the Ne-NO complex. This data enabled the creation of a 2D potential energy surface for this molecule.

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Area of Science:

  • Chemical Physics
  • Molecular Spectroscopy
  • Quantum Chemistry

Background:

  • The Ne-NO complex is a van der Waals molecule studied for insights into intermolecular forces.
  • Understanding such complexes is crucial for modeling chemical reactions and physical processes.

Purpose of the Study:

  • To investigate the rotational and rovibrational transitions of the Ne-NO complex in its electronic ground state.
  • To determine a two-dimensional intermolecular potential energy surface (PES) for the Ne-NO complex.

Main Methods:

  • Fourier-transform microwave spectroscopy was used to observe transitions.
  • A free-rotor model was employed for spectral analysis.
  • High-level ab initio calculations aided in PES determination.

Main Results:

  • Observed rotational and rovibrational transitions with parity doublings and hyperfine structures.
  • The spectral analysis yielded a standard deviation of 12 kHz.
  • A 2-dimensional intermolecular potential energy surface was successfully determined.

Conclusions:

  • The study provides a detailed characterization of the Ne-NO complex's ground electronic state.
  • The derived PES is valuable for theoretical studies of Ne-NO interactions.
  • High-resolution spectroscopy combined with theoretical calculations is effective for characterizing weakly bound complexes.