Organic 2 Review Problem 50

Organic 2 Review Problem 50 - 34 P RACTICAL ORGANIC C...

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34 PRACTICAL ORGANIC CHEMISTRY If the organic compound which is being steam-distilled is freely soluble in water, an aqueous solution will ultimately collect in the receiver F, and the compound must then be isolated by ether extraction, etc. Alternatively, a water-insoluble compound, if liquid, will form a separate layer in F, or if solid, will probably crystallise in the aqueous distillate. When steam-distilling a solid product, it is sometimes found that the distilled material crystallises in E, and may tend to choke up the condenser: in such cases, the water should be run out of the condenser for a few minutes until the solid material has melted and been carried by the steam down into the receiver. Experiment 7. Steam-distillation. Students should carry out the purification by steam distillation of (a) crude nitrobenzene or chlorobenzene, or of ( b ) crude naphthalene, o -nitrophenol (p. 170) or p -tolunitrile (p. 194) as examples of solid compounds which may also be purified in this way. When the distillation is complete, disconnect the tubing
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.

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