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Aliphatic nucleophilic substitution main...

Aliphatic nucleophilic substitution mainly takes place by two mechanisms (i.e) `SN^1 & SN^2` Primary halides mainly undergo by `SN^2` mechanism and are favourable in polar aprotic solvents. `SN^1` reactions takes place mainly by tertiary halide and are more favourable in polar protic solvents, In case of tertiary halides, `E_1` comes competition to `SN^1` reaction. Keeping in view of these general points, answer the following questions
Which of the following reactions, the reactions takes place by `SN^1` mechanism mainly.

A

B

C

D

`CH_3CH_2CH_2Br`

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The correct Answer is:
A
Formation stable carbocation is the major required condition, benzyl carbocation is very stable due to resonance
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Aliphatic nucleophilic substitution mainly takes place by two mechanisms (i.e) SN^1 & SN^2 Primary halides mainly undergo by SN^2 mechanism and are favourable in polar aprotic solvents. SN^1 reactions takes place mainly by tertiary halide and are more favourable in polar protic solvents, In case of tertiary halides, E_1 comes competition to SN^1 reaction. Keeping in view of these general points, answer the following questions (+)C_6H_5CH(CH_3)Cl to (pm) C_6H_5CH(OH)CH_3 in which of the following solvents, the above reaction is most favourable

All the following reactions are SN^2 reactions except

Explain SN^(1) reaction

Which of the following alkyl halides mainly undergo reaction by SN^2 mechanism.

Which of the following reaction takes place through SN^2 mechanism ?

Why S_(N^(1)) reactions are favourable in polar solvents?

Which of the following are polar protic solvents

Which of the following primary halides is most reactive towards SN^1 reaction

Which of the following halo alkane is most reactive towards SN^1

SN^1 reactions never occur on