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Question : 9
Total: 12
(a) What happens when
(i) Propanone is is treated withCH 3 MgBr
(ii) Ethanal is treated with excess ethanol and acid?
(iii) Methanal undergoes Cannizzaro reaction?
(b) Write the main product in the following reaction?
(i)2 CH 3 COCl + ( CH 3 ) 2 Cd ─ ─ ─ ─ ▸
(ii)CH 3 CH 2 CHO
(i) Propanone is is treated with
(ii) Ethanal is treated with excess ethanol and acid?
(iii) Methanal undergoes Cannizzaro reaction?
(b) Write the main product in the following reaction?
(i)
(ii)
Solution:
(a) (i) When propanone reacts with ethyl magnesium bromide (Grignard's reagent) and hydrolysed, it forms aldehyde.
( CH 3 ) 2 CO + H 3 CCH 2 MgBr
(ii) When ethanal reacts with excess ethanol and acid gives acetal.
(iii) Methanal will undergo Cannizzaro reaction as it possessesα
OR
(b) (i)
+
→ 2 CH 3 COCH 3 + CdCl 2
(ii)CH 3 CH 2 CHO
(iii)
(ii) When ethanal reacts with excess ethanol and acid gives acetal.
(iii) Methanal will undergo Cannizzaro reaction as it possesses
OR
(b) (i)
(ii)
(iii)
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