Question

The missing structures A and B in the reaction sequence:

\[\ce{R-CH2-CH2OH ->[Al2O3][350°C] R-CH=CH2 ->[(i) O3][(ii) ZnH3O^⊕] RCHO + A;}\]

\[\ce{RCHO ->[Reduce] B;}\]

are:

Options

• CH₃H, RCOOH

• Methanal, RCH₂OH

• Ethanal, RCOOH

• Methanal, RCHOHR

Answer 1

Methanal, RCH₂OH

Explanation:

\[\ce{R-CH2-CH2OH ->[Al2O3][350°C] R-CH=CH2 ->[(i) O3][(ii) ZnH3O^⊕] RCHO + \underset{\underset{(A)}{Methanal}}{CH2O}}\]

\[\ce{RCHO ->[Reduce] \underset{(B)}{RCH2OH}}\]