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Haloalkanes and Haloarenes question

2012 · Q75
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Haloalkanes and Haloarenes question

2012 · Q75

NEETChemistryHaloalkanes and HaloarenesMCQ+4 / −1
In the replacement reaction
AIPMT 2012 Mains Chemistry - Haloalkanes and Haloarenes Question 23 English
The reaction will be most favourable if M happens to be
  1. A
    Na
  2. B
    K
  3. C
    Rb
  4. D
    Li
View written solutionFree

Correct answer: C

Tertiary alkyl halides shows SN1 mechanism to the greater extent. In the given reaction negative ion will attack on carbocation. Thus, greater the tendency of ionization (greater ionic character in M-F bond) more favourable will be reaction. In the given options Rb-F is most ionic and hence it will be most favourable for SN1 mechanism.

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