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Related Experiment Videos

Rovibrationally averaged nuclear shielding constants in OCS

K Jackowski1, M Jaszuński, W Makulski

  • 1Department of Chemistry, Warsaw University, Pasteura 1, Warsaw, 02 093, Poland.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|January 8, 1999
PubMed
Summary

This study combines theoretical calculations and experimental measurements to analyze nuclear shielding constants in OCS. Results show good agreement between calculated and experimental data for 13C shielding, and a new absolute shielding scale for 33S is presented.

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Area of Science:

  • Physical Chemistry
  • Quantum Chemistry
  • Spectroscopy

Background:

  • Nuclear shielding constants are crucial for understanding molecular electronic structure.
  • Previous studies on OCS have provided limited data on temperature-dependent shielding.
  • Accurate shielding scales are essential for interpreting Nuclear Magnetic Resonance (NMR) data.

Purpose of the Study:

  • To investigate nuclear shielding constants in OCS using advanced theoretical methods.
  • To experimentally determine the temperature dependence of 13C shielding in gas-phase OCS.
  • To establish a more accurate absolute shielding scale for 33S.

Main Methods:

  • Ab initio theoretical calculations of shielding surfaces.
  • Gas-phase Nuclear Magnetic Resonance (NMR) measurements.

Related Experiment Videos

  • Analysis of rovibrational effects on shielding constants.

    • Main Results:

    • Calculated shielding surfaces for OCS were obtained.
    • Experimental determination of 13C shielding temperature dependence (278-373 K).
    • Observed good agreement between theoretical and experimental 13C shielding data.
    • Discussion of a new, more accurate absolute shielding scale for 33S.

    Conclusions:

    • Ab initio methods accurately predict nuclear shielding constants in OCS.
    • Experimental data validates theoretical calculations for 13C shielding.
    • The study provides a refined absolute shielding scale for 33S, enhancing NMR applications.