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2000
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In the Laboratory
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A Practical Procedure for the Solid-Phase Synthesis of Azo Compounds in the Undergraduate Organic Laboratory
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Cailan Wang, Xiaoxia Wang, Yulu Wang, Xiaoyang Wang, and Hong Wang
Department of Chemistry, Henan Normal University, Xinxiang 453002, P.R.C.
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July 2000
Vol. 77 No. 7
p. 903
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| Abstract |
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A new solid-phase reaction method used to synthesize a new type of azo compound is described. The procedure is short, safe, and simple enough to serve as a laboratory exercise for undergraduate students in the middle weeks of a course when azo compounds or synthesis methods have been discussed in the lecture. The compounds synthesized are N-(4'-ethoxyphenyl)-2-phenyl diazenecarboxamide and phenyl-2-phenylhydrazide diazenecarboxylic acid. They can easily be obtained by oxidation of N-(4'-ethoxyphenyl)-2-phenyl hydrazinecarboxamide and 2,2'-diphenyl-carbonic dihydrazide using ferric nitrate as an oxidation reagent in a solid phase reaction .
N-(4'-Ethoxyphenyl)-2-phenyl diazenecarboxamide can be used as dye, and phenyl-2-phenylhydrazide diazenecarboxylic acid is a reagent already widely used in analytical chemistry. The experiments are also designed to demonstrate the uses of the products. All the experimental work can be completed in a three-hour period. All processes use inexpensive equipment and materials that are readily available in most undergraduate laboratories.
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| Supplement |
Written material used by students, instructor notes, practical procedure, and a demonstration of the use of azo compounds are included.
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| More Information |
Citation |
Wang, Cailan; Wang, Yulu; Wang, Xiaoyang; Wang, Xiaoxia; Wang, Hong. J. Chem. Educ. 2000 77 903.
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Keywords |
Laboratory Instruction; Organic Chemistry; Organic Synthesis; Teaching / Learning Aids; Undergraduate Research
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History |
Created:
Last Updated: |
June 2, 2000
August 31, 2005
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