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Standard XII

Chemistry

SN1 Reaction Mechanism

The first ste...

Question

The first steps of ${S N}^{1}$ and ${S N}^{2}$ reactions are, respectively:

Both exothermic

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Both endothermic

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Endothermic and exothermic

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Exothermic and endothermic

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Solution

The correct option is C Endothermic and exothermic
In ${S N}_{2}$ , there is only one step, and it is exothermic. But in ${S N}_{1}$ there are two steps first step; is endothermic and second step is exothermic.

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Similar questions

Consider the reactions

(i) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{5} O H - ---- \to (C H_{3})_{2} C H - C H_{2} O C_{2} H_{5} + H B r$

(ii) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{S} O^{-} - ---- \to (C H_{3})_{2} C H C H_{2} O C_{2} H_{5} + B r^{-}$

The mechanism of reactions (i) & (ii) are respectively

Q. Consider the following statements :
(1) Bridgehead halides are inert towards both

S {_{N}}^{1}

and

S {_{N}}^{2}

reactions (till one of the ring size is eight member ring)
(2) The first step in both

S {_{N}}^{1}

and

E_{1}

(3)

S {_{N}}^{2}

reaction proceed with total retention of configuration
(4)

E_{2}

elemnations are by use of asolvent of low polarity and high concentration of a strong base
Which og the above statements are correct?

Q. Explain

S_{N} 1

and

S_{N} 2

reactions.

Energy diagram of $S_{N} 1$ and $S_{N} 2$ reactions The order of hydrolysis of RX by $S N^{1}$ is $3^{\circ} > 2^{\circ} > 1^{\circ}$ RX and $S N^{2}$ path is $1^{\circ} > 2^{\circ} > 3^{\circ}$ RX.

Which of the following statements are correct for the above energy diagrams of $S_{N} 1$ and $S_{N} 2$ reactions?

Q. Difference between

S_{N} 1

and

S_{N} 2

reactions.

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The first steps of SN1 and SN2 reactions are, respectively:

The correct option is C Endothermic and exothermicIn SN2, there is only one step, and it is exothermic. But in SN1 there are two steps first step; is endothermic and second step is exothermic.

The first steps of ${S N}^{1}$ and ${S N}^{2}$ reactions are, respectively:

The correct option is C Endothermic and exothermic
In ${S N}_{2}$ , there is only one step, and it is exothermic. But in ${S N}_{1}$ there are two steps first step; is endothermic and second step is exothermic.