Question

Benzalacetone is the product of mixed aldol condensation between benzaldehyde $(C_6{H}_{5}CH=O)$ and acetone $\left[\right(C{H}_3{)}_{2}C+O]$. What is its structure?

• A. $C_6{H}_{5}CH=CH\stackrel{O}{\stackrel{||}{C}}C{H}_3$
• B. $C_6{H}_{5}CH=C(C{H}_3{)}_2$
• C. $C_6{H}_5\stackrel{O}{\stackrel{||}{C}}CH=CHC{H}_3$
• D. $C_6{H}_{5}C{H}_2\stackrel{O}{\stackrel{||}{C}}CH=C{H}_2$

Answer 1

The correct option is A $C_6{H}_{5}CH=CH\stackrel{O}{\stackrel{||}{C}}C{H}_3$

Refer To image

This is aldol condensation reaction. A mixture of products are possible in cross aldol reaction but major is as above. This is $\alpha ,\beta$ unsaturated ketone.