CH 3 CHO + HCHO xrightarrow[ textHeat] text Dil.NaOH A xrightarrow[H2O+] HCN B The structure of compound B is

Question

CH 3 CHO + HCHO xrightarrow[ textHeat] text Dil.NaOH A xrightarrow[H2O+] HCN B The structure of compound B is (A)

(B)

(C)

(D)

Tardigrade Admin · Accepted Answer

It undergoes aldol condensation to give

C H_{2} (O H) C H_{2} (C H O)

which dehydrates to give

C H_{2} C H C H O

When this is treated with

H CN / H_{3} O^{+}

, it gives the carboxylic acid.

C H_{3} C H O + H C H O DilNaOH C H_{2} (O H) C H_{2} C H O

C H_{2} (O H) C H_{2} C H O Δ C H_{2} = C H C H O

C H_{2} = C H C H O H CN C H_{2} = C H C H (O H) (CN)

C H_{2} = C H C H (O H) (CN) H_{3} O^{+} C H_{2} = C H - C H (COO H) (O H)

Q. CH3​CHO+HCHO Dil.NaOH Heat​AHCNH2​O+​B The structure of compound B is