3 i 4 PRACTICAL ORGANIC CHEMISTRY Yield, 22-23 g. This product has m.p. 152-155° when heated from room temperature, and 155-156° when immersed in a heating-bath at 140°. Arsonic acids, like carboxylic and sulphonic acids (pp. 349, 353), usually give crystalline benzylthiouronium salts. Add just sufficient dilute aqueous sodium hydroxide dropwise with shaking to a suspension of 0-5 g. of phenylarsonic acid in 10 ml. of water to give a clear solution. Then add 0-5 g. of benzylthiouronium chloride dissolved in io ml. of water. Filter off the precipitated benzylthiouronium salt, wash with water and dry: m.p. 114-117°: it tends to dissociate on attempted recrystallisation. Benzylphenylarsinic Acid. C 6 H 6 CH 2 (C 6 H 6 ) As.O(OH). (The Meyer Reaction.) The Meyer Reaction in arsenic chemistry bears some analogy to the Arbusov Reaction in phosphorus chemistry. If, for example, methyl iodide is added to a solution of arsenic trioxide in an excess of aqueous sodium hydroxide, i.e., an alkaline solution
This is the end of the preview. Sign up
access the rest of the document.
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.