rate of racemisation

[koolman]

In an experiment, Hughes studied the rate of racemisation of 2-iodooctane by sodium iodide (with

radioactive iodine) in acetone and compared it with the rate of incorporation of radioactive iodine into 2-iodooctane.

How will the rate of racemisation compare with the rate of incorporation if

(I) Each act of exchange proceeds with retention

of configuration

(II) Each act of exchange proceeds with

inversion of configuration

II) Each act of exchange proceeds randomly in

which retention and inversion are equally likely