MCQ
Which will dehydrate easily
- A$3-$ methyl $-2-$ butanol
- BEthyl alcohol
- C$2-$ methyl propane $-2-$ ol
- ✓$2-$ methyl butanol $-2$
✓
Answer
Correct option: D.
$2-$ methyl butanol $-2$
d
It’s Obvious.
It’s Obvious.
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Consider the following statements :
$(1)$ Bridgehead halides are inert towards both $S_{N^1}$ and $S_{N^2}$ reactions ( till one of the ring size is eight member ring)
$(2)$ The first step in both $S_{N^1}$ and $E_1$ reactions is the same
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$(4)\, E_2$ eliminations are by the use of a solvent of low polarity and high concentration of a strong base
→$(1)$ Bridgehead halides are inert towards both $S_{N^1}$ and $S_{N^2}$ reactions ( till one of the ring size is eight member ring)
$(2)$ The first step in both $S_{N^1}$ and $E_1$ reactions is the same
$(3)$ $S_{N^2}$ reactions proceed with total retention of configuration
$(4)\, E_2$ eliminations are by the use of a solvent of low polarity and high concentration of a strong base
Which of the above statements are correct?
In the following reaction
→$\begin{array}{*{20}{c}}
{C{H_3}\,\,\,\,\,\,\,\,\,\,\,}\\
{\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{C{H_3} - C - CH = C{H_2}}\\
{\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$ $\xrightarrow{{{H_2}O/{H^ \oplus }}}$ $\mathop A\limits_{{\rm{(major)}}} $ + $\mathop B\limits_{{\rm{(minor)}}} $
The major product is
${C_2}{H_5} - C \equiv C - {C_2}{H_5}\xrightarrow{{Na(liq.\,N{H_3})}}(A)\xrightarrow{{B{r_2}/CC{l_4}}}(B)$
→Correct statement regarding $B$ product?
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