Which of the following statements regarding dissociative substitution in an octahedral transition metal complex,
\[ \begin{array}{l} (1)\ \text{High steric hindrance between ligands in the metal complex favours fast dissociation of ligand.} \\ (2)\ \text{Increased charge on the metal atom/ion of the complex favours the acceptance of electron pair of the entering ligands.} \\ (3)\ \text{A penta-coordinated intermediate is observed.} \\ (4)\ \text{Nature of the entering ligand significantly influences the reaction.} \end{array} \]
Which are correct?
(a)1 and 4
(b)1 and 3
(c)1, 3 and 4
(d)1, 2, 3 and 4
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
In a dissociative path, steric crowding speeds ligand loss and a five-coordinate intermediate forms. Higher metal charge slows dissociation, and the entering ligand barely matters. 1 and 3 (b).