The order of reactivity of the compounds C_6H | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The reactivity of alkyl halides in $S_N2$ reactions is primarily governed by steric hindrance. The nucleophile attacks from the side opposite to t

Vedclass · Accepted Answer

$C_6H_5C(CH_3)(C_6H_5)Br < C_6H_5CH(C_6H_5)Br < C_6H_5CH(CH_3)Br < C_6H_5CH_2Br$

Vedclass · Answer

(A) The reactivity of alkyl halides in $S_N2$ reactions is primarily governed by steric hindrance. The nucleophile attacks from the side opposite to the leaving group. As the number of bulky groups attached to the electrophilic carbon increases,the steric hindrance increases,making the $S_N2$ reaction slower.The compounds are:$1$. $C_6H_5CH_2Br$ (Primary,least hindered)$2$. $C_6H_5CH(CH_3)Br$ (Secondary,more hindered than primary)$3$. $C_6H_5CH(C_6H_5)Br$ (Secondary,more hindered than $C_6H_5CH(CH_3)Br$ due to the bulky phenyl group)$4$. $C_6H_5C(CH_3)(C_6H_5)Br$ (Tertiary,most hindered)Thus,the order of reactivity in $S_N2$ is: $C_6H_5C(CH_3)(C_6H_5)Br < C_6H_5CH(C_6H_5)Br < C_6H_5CH(CH_3)Br < C_6H_5CH_2Br$.

Column-$I$	Column-$II$
$(i)$ $R-Cl + NaI \xrightarrow{\text{dry acetone}} R-I + NaCl$	$(a)$ Swarts reaction
$(ii)$ $CH_3-Br + AgF \xrightarrow{\Delta} CH_3-F + AgBr$	$(b)$ Wurtz reaction
$(iii)$ $R-X + Mg$ $\xrightarrow{\text{dry ether}} R-Mg-X$ $\xrightarrow{H_2O} RH + Mg(OH)X$	$(c)$ Finkelstein reaction
	$(d)$ Grignard reaction

The order of reactivity of the compounds $C_6H_5CH_2Br$,$C_6H_5CH(C_6H_5)Br$,$C_6H_5CH(CH_3)Br$ and $C_6H_5C(CH_3)(C_6H_5)Br$ in $S_N2$ reaction is

Similar Questions

When $HNO_3$ is reacted with $ . . . . . . $,chloropicrin is formed.

The reaction $CH_3-CH(C_6H_5)-CH(Br)-C_6H_5 \xrightarrow{alc.KOH} A$. Identify the product $A$.

The reaction of $1$-bromohexane with aqueous $NaOH$ solution follows the order

Sodium ethoxide is a specific reagent for

Vedclass Test Series

Exam Paper Generator

Online Exam Module