P-Chlorophenylarsonic acid

A mixture of 1 part by weight of p-chlorophenol, 1.1 parts of allyl bromide, 1.1 parts of potassium carbonate, and 1.3 parts of acetone is heated under reflux for 4 hours and then poured into water. The mixture is extracted with ether, and the ethereal solution is washed with dilute aqueous sodium hydroxide, then with water, dried over potassium carbonate, and distilled under vacuum. p-Chlorophenyl allyl ether is collected at 106-107°/12 mm., and the yield is quantitative. 

A solution of 126 g. (1.0 mole) of p-chloroaniline and 180 ml. of concentrated hydrochloric acid in 600 ml. of water is diazotized by 

Moureau and Brown, Bull. soc. chim. France, (4), 27, 905 (1920), report a similar preparation in 88% yield of / -bromoproprionitrile from equivalent amounts of hydrogen bromide and acrylonitrile. The product boils at 92°/25 mm. 

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