Orgoreview

The following scheme illustrates a catalytic cycle for the hydrogenation of propene using a rhodium catalyst, Rh[P(C₆H₅)₃]₃Cl. The next three questions refer to this scheme.

i. Which of the labeled steps in the above catalytic cycle is an oxidative addition reaction?

ii. Which of the labeled steps in the above catalytic cycle is a reductive elimination reaction?

iii. Which of the rhodium complexes is a 14 electron complex?

(A) (I)                    (B) (II)                         (C) (III)                       
(D) (IV)                  (E) (V)