![[Halogenation of Propanone - Mechanism A]](../images/four1a.gif)
of Consumption
of Iodine
Approximation
HALOGENATION OF PROPANONE
Review
| Overall Reaction | Pk + I2 → PI + H+ + I- |
| Proposed Mechanism | |
| Overall Rate of Consumption of Iodine | -d[I2]/dt = + k2[Pe][I2] |
| Steady State Approximation | d[Pe]/dt = 0 |
Overall Rate of Production of the enol form of Propanone {d[Pe]/dt}
If the Steady State Approximation is to be applied to the rate of production of the enol form of proponone, an expression for the rate of production of the enol form of proponone must first be derived.
For the proposed mechanism:
The overall rate of production of the enol form of propanone can be expressed as
d[Pe]/dt = + k1[H+][Pk] + k-1[Pe][H+] + k2[Pe][I2]
d[Pe]/dt = + k1[H+][Pk] - k-1[Pe][H+] + k2[Pe][I2]
d[Pe]/dt = + k1[H+][Pk] - k-1[Pe][H+] - k2[Pe][I2]