MCQ
Which of the following is a primary halide?
- ✓Neohexyl chloride
- BSecondary butyl iodide
- CTertiary butyl bromide
- DIso-propyl iodide
✓
Answer
Correct option: A.
Neohexyl chloride
a
In case of unsymmetrical ethers, the site of cleavage depends on the nature of alkyl group.
In case of unsymmetrical ethers, the site of cleavage depends on the nature of alkyl group.
e.g., $C{H_3} - O - {C_2}{H_5}\, + \,HI\,\xrightarrow{{373\,\,K}}C{H_3}I\, + \,{C_2}{H_5}OH$
The alkyl halide is formed from the smaller alkyl group.
However, in case of tertiary alkyl ether following reaction occurs.
$\mathop {C{H_3} - OC{{(C{H_3})}_3}}\limits_{ter - butyl\,\,methyl\,\,ether} + \,HI\,\xrightarrow{{373\,\,K}}$ ${(C{H_3})_3}C - I\, + \,C{H_3}OH$
The alkyl halide is formed from the tertiary alkyl group and the cleavage of such ethers occurs by $S_{N^1}$ mechanism as the product is controlled by the formation of more stable intermediate tertiary carbocation from orotonated ether.
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
Which of the following is most acidic
Which is an electrophile
Ozonolysis of which one of the following will give two molecules of acetaldehyde
During depression of freezing point in a solution the following are in equilibrium
The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?
The atomic number of an element having the valency shell electronic configuration $4{s^2}4{p^6}$ is
→Which is false
What is the $pH$ of $0.1\,M\,N{H_3}$
→The number of correct reaction $(s)$ among the following is $\qquad$
→A solution containing $10 \mathrm{~g}$ of an electrolyte $\mathrm{AB}_2$ in $100 \mathrm{~g}$ of water boils at $100.52^{\circ} \mathrm{C}$. The degree of ionization of the electrolyte $(\alpha)$ is............ $\times 10^{-1}$.
→(nearest integer)
[Given : Molar mass of $\mathrm{AB}_2=200 \mathrm{~g} \mathrm{~mol}^{-1} \cdot \mathrm{K}_{\mathrm{b}}$
(molal boiling point elevation const. of water)
$=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$, boiling point of water $=100^{\circ} \mathrm{C}$;
$\mathrm{AB}_2$ ionises as $\left.\mathrm{AB}_2 \rightarrow \mathrm{A}^{2+}+2 \mathrm{~B}^{-}\right]$