Question

The correct option having one complex from each of the following pairs which is more reactive towards the oxidative addition reaction by hydrogen molecule is

• A. (I) and (III)
• B. (I) and (IV)
• C. (II) and (III)
• D. (II) and (IV)

Hint:

Oxidative addition reactions are favored by complexes with low oxidation states and ligands that can stabilize the resulting higher oxidation states.

Answer 1

The Correct Option is A

Step 1: Understanding oxidative addition.
The reactivity of a complex towards oxidative addition is influenced by the metal's oxidation state and the ligands attached. Complexes with low oxidation states and ligands that can easily accommodate changes in coordination geometry are more reactive.
Step 2: Analyzing the pairs.
Pair (II) and (IV) contain complexes with metal centers that are more likely to undergo oxidative addition due to their electronic configuration and the nature of the ligands.
Step 3: Conclusion.
Thus, the correct answer is (D) (II) and (IV).