$S_N1$ પ્રક્રિયા માટે નીચેના ભાગોની પ્રતિક્રિયાશીલતાનો વધતો ક્રમ કયો છે ?
$(I)\,\begin{array}{*{20}{c}}
{C{H_3}CHC{H_2}C{H_3}} \\
{|\,\,\,\,\,\,\,\,\,\,\,} \\
{Cl\,\,\,\,\,\,\,\,\,}
\end{array}$
$(II)\,CH_3CH_2CH_2Cl$
$(III)\,H_3CO-C_6H_4-CH_2Cl$
JEE MAIN 2017, Diffcult
Download our app for free and get started
b
Secondary, tertiary and benzylic halides appear to react by a mechanism that involves the formation of a carbocation and proceeds through \(\mathrm{S}_{\mathrm{N}} 1\) mechanism which takes place in two steps. The first step is the slow step \(-\) it is the rate-determining step. In this step, a molecule of alkyI halide ionizes and becomes an alkyl cation. Therefore, greater the stability of carbocation greater will be its tendency to react via \(S_{N} 1\) mechanism.
Secondary, tertiary and benzylic halides appear to react by a mechanism that involves the formation of a carbocation and proceeds through \(\mathrm{S}_{\mathrm{N}} 1\) mechanism which takes place in two steps. The first step is the slow step \(-\) it is the rate-determining step. In this step, a molecule of alkyI halide ionizes and becomes an alkyl cation. Therefore, greater the stability of carbocation greater will be its tendency to react via \(S_{N} 1\) mechanism.
\(\mathrm{R}-\mathrm{X} \rightleftharpoons \mathrm{R}^{+}+\mathrm{X}^{-}\)
In the second step, the intermediate alkyl cation reacts rapidly with water to produce alcohol.
\(\mathrm{R}^{+}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{ROH}\)
Hence, the order of reactivity of halides for the \(\mathrm{S}_{\mathrm{N}} 1\) mechanism is \(\mathrm{II}<\mathrm{I}<\mathrm{III}\).
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1ઉપરની પ્રક્રિયામાં બનતો એસિડ $D$ શોધો.View Solution
- 2View Solutionક્લોરોફોર્મને ઘાટા રંગની બોટલમાં શા માટે રાખવામાં આવે છે ?
- 3નીપજ $(A)$ શું હશે ?View Solution
- 4View Solutionઆલ્કોહોલિક સિલ્વર નાઇટ્રાઇટની ઇથાઇલ બ્રોમાઇડ સાથેની પ્રક્યિાથી મળતી નીપજ .............. છે.
- 5View Solutionક્લોરોફોર્મને ધેરા રંગની બોટલમાં રાખવામાં આવે છે, કારણ કે તે ..............
- 6$\begin{gathered}View Solution
\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - {\text{ }}C - {\text{ }}O - H\xrightarrow{{NaH{{\mathop {CO}\limits^{14} }_3}}}\mathop {(A)}\limits_{(gas)} \xrightarrow[{(ii){H_3}{O^ \oplus }}]{{(i)PhMgBr}}(B)}
\end{array} \hfill \\
\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - S - O - H\xrightarrow{{NaH\mathop {C{O_3}}\limits^{14} }}\mathop {(C)}\limits_{(gas)} \xrightarrow[{(ii){H_3}{O^ \oplus }}]{{(i)PhMgBr}}(D)} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array} \hfill \\
\end{gathered}$ઉપરોક્ત પ્રકિયા માં નીપજ $(B)$ અને $(D) $ શું હશે ?
- 7ઉપરની પ્રક્રિયા ધ્યાનમાં લો, નીપજ $‘p’$ માં $\pi$ - ઈલેકટ્રોનોની સંખ્યા$\dots\dots$View Solution
- 8$AgNO_3$ સાથે ગરમ કરતા આયોડોફોર્મ અવક્ષેપ આપે છે, પરંતુ ક્લોરોફોર્મ અવક્ષેપ આપતું નથી કારણ કે ..........View Solution
- 9View Solutionઔધોગિક રીતે ક્લોરોબેન્ઝિન...... દ્વારા બનાવાય છે.
- 10નીચેના સંયોજનોનો કેન્દ્રાનુરાગી વિસ્થાપન $\left( S _{ N }{ }^{2}\right)$ તરફની પ્રતિક્રિયાશીલતાનો ઘટતો ક્રમ કયો છે?View Solution
