Question

Methyl acetylene on ozonolysis gives
a) acetaldehyde
b) acetone
c) glyoxal
d) methyl glyoxal

Answer 1

Methyl glyoxal. (By ozonolysis)

Answer 2

Answer:

The correct answer is option d.

Explanation:

When oxidation of alkynes in presence of ozone gives di-keto product.

$RC\quiv CR'\overset{O_3}\rightarrow R-C(O)-C(O)-R'$

So, when oxidation of methyl acetylene in presence of ozone gives di-keto product that methyl-glyoxal.

$CH_3C\equiv CH\overset{O_3}\rightarrow CH_3-C(O)-C(O)-H$