Fundamental Organic Chemistry
Fundamental Organic Chemistry
Fundamental Organic Chemistry
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B) Fehling's solution<br />
In a test tube put 1ml of benzaldehyde<br />
+1ml of Fehling solution A +1ml of<br />
Fehling solution B & then heat on water<br />
bath for 3 min<br />
Solution turns<br />
green and after<br />
some time<br />
a red ppt.<br />
Due to Oxidation of<br />
benzaldehyde to<br />
benzoic acid &<br />
reduction for CuO to<br />
Cu 2 O (red ppt.) .<br />
4-Cannizzaro Reaction<br />
In a test tube put 1ml of benzaldehyde<br />
+ 3ml NaOH 30% & heat on water bath<br />
for 3 min. then add drops of H 2 O and<br />
drops of HCl Conc.<br />
White ppt. is<br />
formed<br />
The white ppt. is<br />
benzoic acid (21).<br />
O<br />
COONa<br />
CH2OH<br />
C<br />
H<br />
NaOH<br />
+<br />
......(21)<br />
COOH<br />
Sodium benzoate Benzyl alcohol<br />
NaCl<br />
+<br />
HCl<br />
White ppt.<br />
51
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