REACTIONS AND IDENTIFICATION 345 3. Action of sodium hydroxide. Does not undergo the Cannizzaro reaction. It dissolves in dil. NaOH solution, giving a yellow solution from which the aldehyde is precipitated unchanged on acidification. If heated with cone. NaOH solution, salicylaldehyde slowly undergoes atmospheric oxidation to salicylic acid. 4. Does not reduce ammoniacal AgNO 8 (except on long standing). 5. It does not reduce Fehling's solution, but turns it a pale green colour. (Note that salicylaldehyde turns ordinary copper sulphate solution a pale green.) 6. Bisulphite addition compound. The formation of the bisulphite compound is delayed and appears only after 2-3 minutes' shaking. 7. Action of ammonia. To I ml. of aldehyde add i ml. of aqueous ammonia: a precipitate of hydrosalicylamide, (HOC 6 H 4 CH) 3 N 2 , is rapidly produced. Section 13. Ketones. C:O. (cf. Tables IX, X, 541-542) Acetone, ethyl methyl ketone, diethyl ketone; acetophenone, ben-zophenone (and their nuclear-substituted derivatives). Cyclohex-
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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.