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The TCICA Test for Distinguishing Aldehydes and Ketones

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Gene A. Hiegel , Christine Juska and Michelle Kim

Department of Chemistry and Biochemistry, Califonia State University, Fullerton, Fullerton, CA 92834-6866

J. Chem. Educ., 2001, 78 (8), p 1105

DOI: 10.1021/ed078p1105

Publication Date (Web): August 1, 2001

Section:

History, Education, and Documentation

Abstract

Simple aldehydes and ketones can easily be distinguished by their rate of reaction with trichloroisocyanuric acid (TCICA). The test is conducted by adding the unknown to a solution of TCICA in acetonitrile containing hydrochloric acid and methanol and watching for a precipitate to form. Aliphatic aldehydes react rapidly, aromatic aldehydes generally take longer, and ketones do not react within a laboratory period.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Qualitative Analysis

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Qualitative Organic Analysis - In the Classroom and Laboratory
K. Thomas Finley
Journal of Chemical Education2005 82 (2), 240
- Qualitative Organic Analysis - In the Classroom and Laboratory
  K. Thomas Finley
  Journal of Chemical Education2005 82 (2), 240
  The identification of molecular structure remains central to the study of chemistry and the search for new and useful materials. The classical methods of qualitative organic analysis provide opportunities to illustrate the fascinating world of science to ...
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