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esters

esters. RCOOH. +. miscibility. All immiscible in H 2 O , 10% NaOH and dil. HcL . ALL are neutral. In H 2 O ethyl acetate form layer lighter than H 2 O but methyl salicylate and ethyl benzoate form layer heavier than H 2 O . Preliminary test. General and spesific.

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esters

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  1. esters RCOOH +

  2. miscibility • All immiscible in H2O , 10% NaOH and dil. HcL . • ALL are neutral. • In H2O ethyl acetate form layer lighter than H2O but methyl salicylate and ethyl benzoate form layer heavier than H2O

  3. Preliminary test

  4. General and spesific • Hydroxylamine test: • 1ml ester + hydroxylamine powder +10 % NaOH then warm until become clear solution + add 1 ml dilHcl +fecl3 • Ethyl acetate→ reddish brown. • Methyl salicylate→ reddish violet. • Ethyl benzoate→ reddish brown

  5. Hydrolysis: • IR location: • Ester stretching band at 1735 cm-1

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