MCQ
The conversion of acetophenone to acetanilide is best accomplished by using :
- ✓Backmann rearrangement
- BCurtius rearrangement
- CLossen rearrangement
- DHofmann rearrangement
✓
Answer
Correct option: A.
Backmann rearrangement
a
$\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\
{\,\,\,\,\,\,\,\,\,\,|\,} \\
{{C_6}{H_5} - C = O}
\end{array}$ $\xrightarrow[{ - {H_2}O}]{}$$\underset{\begin{smallmatrix}
\text{Acetophenone oxime or} \\
\text{methyl phenyl ketoxime}
\end{smallmatrix}}{\mathop{\begin{matrix}
\,\,\,\,\,C{{H}_{3}} \\
|\, \\
{{C}_{6}}{{H}_{5}}-C=NOH \\
\end{matrix}}}\,$
$\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\
{\,\,\,\,\,\,\,\,\,\,|\,} \\
{{C_6}{H_5} - C = O}
\end{array}$ $\xrightarrow[{ - {H_2}O}]{}$$\underset{\begin{smallmatrix}
\text{Acetophenone oxime or} \\
\text{methyl phenyl ketoxime}
\end{smallmatrix}}{\mathop{\begin{matrix}
\,\,\,\,\,C{{H}_{3}} \\
|\, \\
{{C}_{6}}{{H}_{5}}-C=NOH \\
\end{matrix}}}\,$
$\xrightarrow[\begin{subarray}{l}
{\text{Backmann}} \\
{\text{rearrangement}}
\end{subarray} ]{{{H_2}S{O_4}}}{\mkern 1mu} \mathop {{C_6}{H_5}NHCOC{H_3}}\limits_{{\text{Acetanilide}}} {\mkern 1mu} $
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Four alkali metals $A, B, C$ and $D$ have standard electrode potentials $-3.05, -1.66, -0.40$ and $0.80\, V$ respectively. Which metal will be the most reactive
→The number of water molecule$(s)$ directly bonded to the metal centre in $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is
→Ethyl chloride on heating with silver cyanide forms a compound $X$ . The functional isomer of $ X$ is
→.
What should be the degree of hydrolysis of $0.01\,M$ Lithium formate solution at $25\,^oC$, if $K_h = 3.175 \times 10^{-5}$
→The equivalent mass of a metal is $29.73$ and the vapour density of its chloride is $130.4$. Find out the atomic mass of the metal
→Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :
What is the order of a reaction which has a rate expression rate $ = K{[A]^{3/2}}{[B]^{ - 1}}$
→Match List - $I$ with List - $II$
→|
List - $I$ (Pair of Compounds) |
List - $II$ (Isomerism) |
|
$A$n-propanol and Isopropanol |
$(I)$ Metamerism |
|
$B$Methoxypropane and ethoxyethane |
$(II)$ Chain Isomerism |
|
$C$Propanone and propanal |
$(III)$ Position Isomerism |
|
$D$Neopentane and Isopentane |
$(IV)$ Functional Isomerism |
Choose the correct answer from the options given below:
carbon-carbon double bond length will be maximum in which of the following compounds ?