How many of the statement(s) are correct i) The nucleophile makes a rear attack in S _ N 2 reaction and expels the leaving group from front side. ii) C H _ 3 O - CH = C H _ 2 adds to HBr according to Anti‐Markownikoff’s

Question

Quantrex Academy · Accepted Answer

Correct answer: 3

i) The nucleophile makes a rear attack in

{S}_{N} \text{2}

reaction and expels the leaving group from front side.
iii) The basicity of halides decreases in the order

F^{-} > C{1}^{-} > Br^{-} > I^{-},

but the nucleophillicity is reverse of it. (in polar protic solvents)
v) Sigma complex or arenium ion is resonance stablised.
The above statements are correct.

C{H}_{3}O - CH = C{H}_{2}

adds to

\text{HBr}

according to Markownikoff’s rule.
iv) The rate of

{S}_{N} \text{2}

reaction is faster in polar aprotic solvent.

How many of the statement(s) are correct i) The nucleophile makes a...

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