JEE MAIN - Chemistry (2008 - No. 17)
The organic chloro compound, which shows complete stereochemical inversion during a SN2 reaction,
is
(C2H5)2CHC
(CH3)3CCl
(CH3)2CHCl
CH3Cl
Giải thích
$${S_N}2$$ reaction is favoured by small groups on the carbon atom attached to halogen.
So, the order of reactivity is
$$C{H_3}Cl > {\left( {C{H_3}} \right)_2}CHCl > $$
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\left( {C{H_3}} \right)_3}CCl > {\left( {C{}_2{H_5}} \right)_2}CHCl$$
NOTE : $${S_N}2$$ reaction is shown to maximum extent by primary halides. The only primary halides given is $$C{H_3}Cl,$$ so the correct answer is $$(d). $$
So, the order of reactivity is
$$C{H_3}Cl > {\left( {C{H_3}} \right)_2}CHCl > $$
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\left( {C{H_3}} \right)_3}CCl > {\left( {C{}_2{H_5}} \right)_2}CHCl$$
NOTE : $${S_N}2$$ reaction is shown to maximum extent by primary halides. The only primary halides given is $$C{H_3}Cl,$$ so the correct answer is $$(d). $$