Fundamental Organic Chemistry
Fundamental Organic Chemistry
Fundamental Organic Chemistry
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AROMATIC ORGANIC ACIDS<br />
1-Benzoic acid C 6 H 5 COOH<br />
Benzoic acid is a white crystalline solid undergo sublimation by heating partially<br />
soluble in cold water, freely soluble in hot water and ethanol m.p. is 121 °C .<br />
Test Observation Result<br />
1-Acidity test :<br />
0.25gm of acid +1ml of conc.<br />
NaHCO 3 solution .<br />
CO 2 evolves with<br />
effervescence<br />
The compound from<br />
carboxylic acid.<br />
2-Ferric chloride test :<br />
1ml of N.S. + drops of FeCl 3 .<br />
buff ppt.<br />
The ppt. is basic ferric<br />
benzoate (33) .<br />
COONH 4<br />
+ FeCl 3<br />
COO)Fe(OH) 2<br />
+ NH 4 Cl<br />
3-Estrification test :<br />
0.25gm of acid +1ml of ethanol<br />
+1ml of conc. H 2 SO 4 & heat in water<br />
bath 3 min. then pour into beaker<br />
contain NaHCO 3 solution .<br />
Specific odor<br />
…(33)<br />
The odor due to Ethyl<br />
benzoate (34) .<br />
COOH<br />
+<br />
C 2 H 5 OH<br />
H 2 SO 4<br />
conc<br />
COOC 2 H 5<br />
+<br />
H 2 O<br />
Ethyl benzoate<br />
…(34)<br />
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