MCQ
Which of the following substituents will decrease the acidic strength of phenol?
- A$-NO_2$
- B$-CN$
- ✓$-CH_3$
- D$-CHO$
✓
Answer
Correct option: C.
$-CH_3$
c
$+ I\, \propto \, \frac{1}{acidic \,strength} \, -CH_3$ has $+I$ effect which destabilizes conjugate anion
$+ I\, \propto \, \frac{1}{acidic \,strength} \, -CH_3$ has $+I$ effect which destabilizes conjugate anion
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$\begin{array}{*{20}{c}}
{C{H_3} - C - C{H_2} - COOH} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
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{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
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