$\mathop {C{H_3} - \mathop C\limits^ \oplus H - C{H_3}}\limits_I $
$\mathop {C{H_3} - \mathop C\limits^ \oplus H - OC{H_3}}\limits_{II} $
$\mathop {C{H_3} - \mathop C\limits^ \oplus H - C{H_2} - OC{H_3}}\limits_{III} $
\(\mathop {\mathop {C{H_3} \to \mathop C\limits^ \oplus H \leftarrow C{H_3}}\limits_I }\limits_{ + I - effect\,of\,two\,methyl\,group\,stabilise\,the\,carbocation\,(I)} \) ;
\(\mathop {\mathop {C{H_3} \to \mathop C\limits^ \oplus H - \mathop O\limits_{\,}^{\,} - C{H_3}}\limits_I }\limits_{Strong\, + R - effect\,of\, - OC{H_3}\,group\,stabilise\,the\,carbocation\,(II)} \)
\(\mathop {\mathop {C{H_3} - \mathop C\limits^ \oplus H - C{H_2} \to OC{H_3}}\limits_{III} }\limits_{ - I - effect\,of\, - OC{H_{3\,}}group\,stabilise\,the\,carbocation\,(III)} \)
Thus, the stability of carbocation decreases in the order,
\(I I>I>I I I\)
નીચે આપેલમાંથી કઈ ગોઠવણી ઉપરોક્ત સંસ્પંદન ફાળો આપનારાઓની સ્થિરતામાં ઘટાડો કરવાનો યોગ્ય ક્રમ આપે છે?
$(i)$ બેઞ્ઝોઈક એસિડ $(ii)\, p$ - મિથોક્સિબેઞ્ઝોઈક એસીડ $(iii)\, o$ - મિથોક્સિબેઞ્ઝોઈક એસિડ



