Practical Organic Chemistry pp 54-113 | Cite as
Isolation and purification of reaction products
Chapter
Abstract
Preparative organic reactions rarely give a complete conversion of the starting material into the required product. In a good ‘synthetic’ reaction a yield of product of 70–80% or more would be expected, but in addition there may be small amounts of other organic materials formed as by-products. In some cases reactions also produce polymeric ‘tarry’ material, which may be a brown or yellow colour. In addition to these organic products, many reactions also produce equimolar amounts of inorganic products, e.g. the metal halides produced in a typical ether synthesis:
$$\textup{RCH}_{2}\textup{Br}\ +\textup{NaOCH}_{3}\rightarrow \textup{RCH}_{2}\textup{OCH}_{3}\ +\textup{NaBr}$$
Keywords
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Notes
- 1.Burfield, D. R. and Smithers, R. H. (1982) J. Cbem. Educ, 59, 703.CrossRefGoogle Scholar
- 1.Riddick, J. A. and Burger, W. B. (1970) Organic Solvents: Physical Properties and Methods of Purification, in Techniques of Chemistry, 3rd edn, vol. 2, Wiley Interscience, New York.Google Scholar
- 2.Gordon, A. J. and Ford, R. A. (1972) The Chemists Companion, Wiley Interscience, New York.Google Scholar
- 3.Burfield, D. R. (1982) J. Org. Chem., 47, 3821.CrossRefGoogle Scholar
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© J. T. Sharp, I. Gosney and A. G. Rowley 1989