A primary alkyl halide would prefer to undergo


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A primary alkyl halide would prefer to undergo _____________. (i) SN1 reaction

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SN1 reaction depends upon the stability of the carbocation formed during substitution reaction. Since among primary, secondary, and tertiary carbocations, Primary carbocations are least stable. Therefore, it doesn’t undergo SN1 reaction.

Relative stabilities of carbocations :



SN1 mechanism :



In SN2 reaction, attack of nucleophile takes place from backward direction. Therefore, steric hindrance is one of the major factor in SN2. Since primary alkyl halide is the least sterically hindered among primary,secondary and tertiary alkyl halides. Therefore, Primary alkyl halides undergo SN2 mechanism.

SN2 mechanism :



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Anushree Anil, studied at Holy Child School

Answered May 21



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