A metal ion `M^(n+)` having `d^(4)` valence electronic configuration combines with three didentate ligands to form a complex compound. Assuming `Delta_(@)gt P` :
(i) Draw the diagram showing d-orbital splitting during this complexes formation.
(ii) What type of hybridisation will `M^(n+)` have?
(iii) Name the type of isomerism exhibited by this complex.
(iv) Write the electronic configuration of metal `M^(n+)`

Explanation

(i) If `Delta_(0) gt P`, pairing will occur in the `t_(2g)` orbitals and `e_(g)` orbitals will remain vacant

(ii) `t_(2g)^(4) e_(g)^(0)` (iii) `d^(2)sp^(3)` (as there are three didentate ligands to combine)
(iv) `[M(A A)_(3)]` type complexes show optical isomerism.