The major product of the following reaction is : [figure]
- [figure]
- CH3-CH2-CH2-OH
- [figure]
- [figure]
Answer
(3) [figure]
Solution
Concept: HCHO has no α-H: it adds to the α-C of the other aldehyde, then reduces it (crossed Cannizzaro).
Step 1: propanal has two α-H ⇒ adds two HCHO (aldol):
[figure]
Step 2: no α-H left ⇒ excess HCHO reduces –CHO to –CH2OH:
[figure]
∴ CH3C(CH2OH)3
Answer: (3)