MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryAlkyl and Aryl HalidesE elimination follows an antiperiplanar structure

In the replacement reaction The reaction will be most favourable if M happens to be (AIPMT 2012)

A.Na

B.K

C.Rb✓ Correct

D.Li

Explanation

Tertiary halide shows SN1 mechanism i.e., ionic mechanism. 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. The most ionic bond is Rb – F in the given examples thus most favourable reaction will be with Rb – F.

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