HALOGENATION OF PROPANONE

Hint

When summing steps in a reaction to give the overall reaction, only the net direction of reversible reactions is considered.

Thus for the reversible reaction

Therefore, to obtain the overall reaction, the following elementary reactions need to be added (and terms appearing on both sides eliminated):

Confirmation that Proposed Mechanism equates to the Overall Reaction

Given that the overall reaction is

P_k + I₂ → PI + H⁺ + I^-

And that the proposed mechanism is

It can be stated that

The Proposed Mechanism does not give the Overall Reaction

The Proposed Mechanism gives the Overall Reaction