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Related Experiment Videos

Pulse Pyrolysis Infrared Laser Jet Spectroscopy of Chloroketene.

Liu1, Livingstone, Davies

  • 1Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom

Journal of Molecular Spectroscopy
|February 7, 2001
PubMed
Summary
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High-Resolution Fourier Transform and Diode-Laser Spectroscopy of the nu(6) Fundamental of C(2)F(6) and Associated Hot Bands.

Journal of molecular spectroscopy·2001

Researchers studied the molecule chloroketene (ClHCCO) using infrared laser-absorption spectroscopy. They precisely measured its nu(2) fundamental band, providing key molecular parameters for this short-lived compound.

Area of Science:

  • Molecular Spectroscopy
  • Chemical Physics
  • Physical Chemistry

Background:

  • Chloroketene (ClHCCO) is a transient molecule challenging to study.
  • Understanding its properties is crucial for reaction dynamics and chemical synthesis.

Purpose of the Study:

  • To characterize the infrared absorption spectrum of chloroketene.
  • To determine accurate molecular parameters for the nu(2) fundamental band.
  • To investigate the properties of short-lived molecules.

Main Methods:

  • Generation of chloroketene via pyrolysis of chloroacetyl chloride.
  • High-resolution infrared laser-absorption spectroscopy in a high-temperature nozzle.
  • Analysis of spectral lines using least-squares fitting and comparison with simulated spectra.

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Main Results:

  • The nu(2) fundamental band of (35)ClHCCO was measured between 2153 and 2161 cm(-1).
  • 230 spectral lines were assigned and measured, yielding accurate molecular parameters for the v(2) = 1 state.
  • The nu(2) band origin for (35)ClHCCO was determined to be 2157.19238(16) cm(-1).
  • The rotational temperature of the jet spectrum was found to be approximately 35 K.

Conclusions:

  • Accurate molecular parameters for chloroketene were obtained.
  • The study provides valuable spectroscopic data for a short-lived molecule.
  • The methods employed enable the characterization of transient chemical species.