You visited us 1 times! Enjoying our articles? Unlock Full Access!

How Do We Decide between the SN1 and SN2 Mechanisms

The rates r1,...

Question

The rates $r_{1}, r_{2}$ and $r_{3}$ are in the order:

r_{1} > r_{2} > r_{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

r_{3} > r_{1} > r_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

r_{1} > r_{3} > r_{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

r_{2} > r_{1} > r_{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $r_{1} > r_{3} > r_{2}$
The reactivity of the given haloalkanes towards nucleophile depend on leaving group ability of halogens.
Also, $Rate of reaction \propto stability of carbocation$
Leaving group ability is $B r^{⊖} > C l^{⊖}$ so $r_{1}$ is more than $r_{3}$ and $r_{2}$ . Now comparing $r_{3}$ and $r_{2}$ , $r_{3}$ will be more than $r_{2}$ as carbocation formed by 3 is more stable than formed by 2.
Hence overall reaction order $r_{1} > r_{3} > r_{2}$

Suggest Corrections

Similar questions

△ A B C, r_{1} r_{2} + r_{2} r_{3} + r_{3} r_{1}

r_{1}, r_{2}

r_{3}

2 s

△ A B C

a < b < c

r

r_{1}, r_{2}, r_{3}

A, B, C

r < r_{1} < r_{2} < r_{3}

△ A B C, r_{1} r_{2} + r_{2} r_{3} + r_{3} r_{1} = \frac{r_{1} r_{2} r_{3}}{r}

L - C - R

ω

R_{1}, R_{2} a n d R_{3}

a (r r_{1} + r_{2} r_{3}) = b (r r_{2} + r_{3} r_{1}) = c (r r_{3} + r_{1} r_{2})

r

r_{1}, r_{2}, r_{3}

A B C

a, b, c

r_{1}, r_{2}, r_{3}

A B C

r

r_{1} r_{2} r_{3} - r (r_{1} r_{2} + r_{2} r_{3} + r_{3} r_{1})

Join BYJU'S Learning Program