Difference between $S_{N} 1$ and $S_{N} 2$ reactions.

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Solution

$S_{N} 1$ $S_{N} 2$
Rate Law Unimolecular Bimolecular
Nucleophile Weak Strong
Solvent Polar protic (Ex:alcohol) Polar aprotic (Ex: DMSO, acetone)
Stereochemistry Mix of retention and inversion Inversion
Electrophile reactivity $3^{o} > 2^{o} >> 1^{o}$ $1^{o} > 2^{o} >> 3^{o}$

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S_{N} 1

S_{N} 2

What is meant by sn1,sn2,sn3 reactions explain briefly and give difference between them and state 10 examples each

Question is for 7 marks

So please keep it somewhat big

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

(S_{N} 2)

(S_{N} 1)

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	$S_{N} 1$	$S_{N} 2$
Rate Law	Unimolecular	Bimolecular
Nucleophile	Weak	Strong
Solvent	Polar protic (Ex:alcohol)	Polar aprotic (Ex: DMSO, acetone)
Stereochemistry	Mix of retention and inversion	Inversion
Electrophile reactivity	$3^{o} > 2^{o} >> 1^{o}$	$1^{o} > 2^{o} >> 3^{o}$