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Safe Preparation of HCl and DCl for IR Spectroscopy

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William R. Furlong and W. Tandy Grubbs

Department of Chemistry, Stetson University, DeLand, FL 32720

J. Chem. Educ., 2005, 82 (1), p 124

DOI: 10.1021/ed082p124

Publication Date (Web): January 1, 2005

Section:

Inorganic Chemicals and Reactions

Abstract

The widely used method of synthesizing HCl and DCl gases for infrared analysis by hydrolysis of benzoyl chloride includes a potentially dangerous final step whereby the frozen product is allowed to heat and expand into an infrared gas cell. The subsequent rapid rise in vapor pressure can "pop" open glass joints in the vacuum line and vent the sample in the face of the user. We describe an improvement on this procedure whereby the product is collected at atmospheric pressure in a large flask, which can subsequently be transferred to the vacuum line for expansion into the infrared gas cell under negative pressure. The alteration described herein is applicable to essentially any synthetic method of HCl and DCl gas or other hazardous gases of spectroscopic interest.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Feature):

Safety Tips

Keywords (Subject):

IR Spectroscopy

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This article has been cited by 3 ACS Journal articles (3 most recent appear below).

Roto-Vibrational Spectroscopy: A Hint for DCl Generation
Eraldo L. Lehmann and Edvaldo Sabadini
Journal of Chemical Education2010 87 (12), 1402-1402
- Roto-Vibrational Spectroscopy: A Hint for DCl Generation
  Eraldo L. Lehmann and Edvaldo Sabadini
  Journal of Chemical Education2010 87 (12), 1402-1402
  During the generation of gaseous DCl for the roto-vibrational spectrum, it is difficult to know if the quantity of gas inside the infrared cell is sufficient. We propose a simple and efficient solution for this task that uses pH indicator paper.
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
Infrared Spectroscopy as a Preview of Coming Attractions: Teaching Chemistry with Instrumental Methods at Two-Year Colleges
David R. Brown, Michelle Bushey
Journal of Chemical Education2010 87 (6), 570-571
- Infrared Spectroscopy as a Preview of Coming Attractions: Teaching Chemistry with Instrumental Methods at Two-Year Colleges
  David R. Brown, Michelle Bushey
  Journal of Chemical Education2010 87 (6), 570-571
  Two-year colleges (2YCs) provide a significant amount of chemical education to undergraduates in the United States. By design, the charge of the 2YCs is to provide coursework at the lower-division level. Nonetheless, general chemistry courses in 2YCs can ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
A Safe and Efficient Technique for the Production of HCl/DCl Gas
Steven G. Mayer , Raymond R. Bard and Kevin Cantrell
Journal of Chemical Education2008 85 (6), 847
- A Safe and Efficient Technique for the Production of HCl/DCl Gas
  Steven G. Mayer , Raymond R. Bard and Kevin Cantrell
  Journal of Chemical Education2008 85 (6), 847
  We present a safe and efficient technique to generate HCl/DCl gas for use in the classic physical chemistry experiment that introduces students to ro-vibrational spectroscopy. The reaction involves thionyl chloride and a mixture of water and deuterium ...
  Abstract | Hi-Res PDF | PDF w/ Links