Which alkyl halide from the following pairs would you expect to react more rapidly by an `S_N2` mechanism ? Explain your answer.
(i) `CH_3CH_2CH_2CH_2Br " or "CH_3CH_2(Br)CH_3`
(ii) `CH_3CH_2CH(Br)CH_3" or "(CH_3)_3CBr`
(iii) `(CH_3)_2CHCH_2CH_2Br " or "CH_3CH_2CH(CH_3)CH_2Br`

Which alkyl halide from the following pairs would you expect to react more rapidly by an S_(N)2 mechanism? Explain your answer. (i) CH_(3)CH_(2)CH_(2)CH_(2)Br or CH_(3)CH_(2)underset(Br)underset(|)CHCH_(3) (ii) CH_(3)CH_(2)underset(Br)underset(|)CHCH_(3) or H_(2)C-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-Br

Which alkyl halide from the following pairs would you expect to react more rapidly by an S_(N)2 mechanism? Explain your answer. (i) CH_(3)CH_(2)CH_(2)CH_(2)Br or CH_(3)CH_(2)underset(Br)underset(|)CHCH_(3) (ii) CH_(3)CH_(2)underset(Br)underset(|)CHCH_(3) or H_(3)C-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-Br

Which alkyl halide from the following pairs would you expect to react more rapidly by an SN_2 mechanism? Explain your answer. (i) CH_(3)CH_(2)CH_(2)CH_(2)Br or CH_(3)CH_(2)underset(Br)underset(|)C HCH_(3) , (ii) CH_(3)CH_(2)underset(Br)underset(|)CHCH_(3) or H_(3)C-underset(CH_(3))underset(|) overset(CH_(3))overset(|)C-Br (iii) CH_(3)underset(CH_(3))underset(|)CHCH_(2)CH_(2)Br or CH_(3)CH_(2)underset(CH_(3))underset(|)CHCH_(2)Br

The structure (CH_3)_2CHCH_2Br and CH_3(CH_2)_3Br shows :

Arrange the following compounds in order of their reactivity towards S_N2 reaction (i) CH_3(CH_2)_3CH_2Br (ii) (CH_3)_2CHCH_2CH_2Br (iii) CH_(3)CH_(2)-overset(CH_(3))overset("| ")"CH"-CH_(2)Br (iv) CH_(3)CH_(2)-overset(CH_(3))overset("| ")"CH"-CH_(2)Br

CH_3-CH_2-CH_2-CH_2-CH(Br)-C(CH_3)_3 overset(alc KOH) to