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In the Laboratory
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Photochemistry of Chloropicrin. A Physical Chemistry Project
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E. A. Wade
Department of Chemistry, Santa Clara University, Santa Clara, CA
95053-0279
T. P. Clemes and K. A. Singmaster
Department of Chemistry, San Jose State University,
San Jose, CA 95192-0101
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July 2000
Vol. 77 No. 7
p. 898
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| Abstract |
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Chloropicrin is an important agricultural fumigant. It is unusual in that its only major removal pathway in the environment is through photodegradation. In this experiment, students will use FTIR spectroscopy to monitor the kinetics of the photolysis of chloropicrin by an Hg arc lamp, both with and without oxygen. They will then be able to determine the mechanism of the photolytic reaction. Chloropicrin initially photodissociates to produce Cl3C and NO2 radicals. These radicals recombine to produce Cl2CO (phosgene) and NOCl. If oxygen is present, the Cl3C radical will react with oxygen first, and NOCl will be produced later.
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| Supplement |
The complete description of this experiment, instructor notes, suggestions, pre-lab work, and figures are included.
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| More Information |
Citation |
Wade, Elisabeth A.; Clemes, T. P.; Singmaster, Karen A. J. Chem. Educ. 2000 77 898.
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Keywords |
Atmospheric Chemistry; Environmental Chemistry; IR Spectroscopy; Kinetics; Laboratory Instruction; Photochemistry
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History |
Created:
Last Updated: |
June 2, 2000
August 31, 2005
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