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Isomeric interconversion in the linear Cl(-)-HD anion complex.

R L Wilson1, Z M Loh, D A Wild

  • 1School Of Chemistry, University of Melbourne, 3010 Victoria, Australia.

The Journal of Chemical Physics
|July 21, 2004
PubMed
Summary
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The infrared photodissociation spectrum of the chloride-hydrogen deuteride anion (Cl(-)-HD) was measured. This study reveals quantum mechanical interconversion between linear Cl-...DH and Cl-...HD structures, crucial for understanding anion complexes.

Area of Science:

  • Chemical Physics
  • Molecular Spectroscopy
  • Quantum Chemistry

Background:

  • Anion-hydrogen complexes offer insights into fundamental chemical interactions.
  • Understanding the dynamics of simple anion complexes is key to broader chemical principles.

Purpose of the Study:

  • To investigate the rotational and vibrational dynamics of the Cl(-)-HD complex.
  • To explore the quantum mechanical interconversion between isomeric structures.

Main Methods:

  • Rotationally resolved infrared photodissociation spectroscopy.
  • Global fitting of transition frequencies with perturbation analysis.
  • Ab initio potential energy surface calculations.

Main Results:

Related Experiment Videos

  • Observed two Sigma-Sigma bands corresponding to ground and excited intermolecular bend states.
  • Perturbative interactions between rotational manifolds were identified and analyzed.
  • Established the energy difference between key isomeric structures (13.7 cm(-1)).

    • Conclusions:

    • The study confirms the importance of quantum mechanical interconversion in anion complexes.
    • Experimental data and theoretical calculations show good agreement, validating the molecular parameters.
    • Provides a detailed understanding of the rovibrational structure of Cl(-)-HD.