1.

Which of the following is correct order of decreasing S_(N)2 reactivity ?

Answer»

`R_(2)CHX GT R_(3)CX gt RCH_(2)X`
`RCH_(2)X gt R_(3)CX gt R_(3)CX`
`RCH_(2)X gt R_(2)CHX gt R_(3)CX`
`R_(3)CX gt R_(2)CHX gt RCH_(2)X ""` (X = HALOGEN)

Solution :Reactivity decreases as the STERIC HINDRANCE i.e., number of alkyl substituents at `alpha` - carbon increases, so option (C ) is correct.


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