Organic 2 Review Problem 122

Organic 2 Review Problem 122 - 106 PRACTICAL O RGANIC...

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106 PRACTICAL ORGANIC CHEMISTRY the ethyl benzoate, collecting the latter as a fraction of b.p. 210- 214°. Yield, 19-20 g. Ethyl benzoate is a colourless liquid, of b.p. 213° and d , 1-05; almost insoluble in water: it has a characteristic odour. For a further example of the Fischer-Speier method, see Ethyl cinnamate, p. 235- Ethyl Iodide. C 2 H 6 I. (Method 5, p. 96.) This is a modification of Method 5, iodine being added to a mixture of red phosphorus and ethanol: phosphorus tri-iodide is thus formed in situ, and readily reacts with the ethanol, giving ethyl iodide and phosphorous acid (p. 96). Required: Red phosphorus, 2-5 g.; ethanol, 25 ml.; iodine, 25 g; Fit a 250 ml. round-bottomed flask securely by means of a tightly fitting, well-bored cork to a reflux condenser capable of talking an ample supply of water. Place in the flask 2-5 g. of red phosphorus, and then 25 ml. (20 g.) of ethanol. Well powder 25 g. of iodine, and add it to the contents of the flask in small quantities of about 3-4 g. at a time, allowing about two minutes
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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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