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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > January  >
In the Laboratory
A Substitute for “Bromine in Carbon Tetrachloride”
Joshua M. Daley and Robert G. Landolt
Department of Chemistry, Texas Wesleyan University, Fort Worth, TX 76105
Cover
January 2005
Vol. 82 No. 1
p. 120
Abstract
Benzotrifluoride (BTF) is a suitable solvent substitute for carbon tetrachloride in experiments requiring application of bromine (Br2) in free radical or addition reactions with organic substrates. A 1 M solution of Br2 in BTF may be used to distinguish hydrocarbons based on the ease of abstraction of hydrogen atoms in thermally or light-induced free radical substitutions. Efficacy of minimization of solvent use, by aliquot addition to neat samples, has been established. This system also provides a useful matrix for testing unknowns for unsaturation or enolizable hydrogen atoms.
Supplement
A table showing the free radical reactions under different solvent conditions is available.
*  Contents
*  Download
JCE2005p0120W.pdf
More Information
*  Citation
 Daley, Joshua M.; Landolt, Robert G. J. Chem. Educ. 2005 82 120.
*  Keywords
 Alkenes; Bromine; First-Year Undergraduate / General; Free Radicals; Green Chemistry; Hands-On Learning / Manipulatives; Laboratory Instruction; Organic Chemistry; Problem Solving / Decision Making; Qualitative Analysis; Reactions
*  History
 Created:
Last Updated:		 November 29, 2004
December 10, 2004
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