Question

What is crystal field splitting energy? How does the magnitude of `triangle_(0)` decide the actual configuration of d orbitals in a coordination entity?
A. if `Delta_(0) lt P` , the configuration is `t_(2g)^(3) e_(g) ^(1)` = weak field ligand and high spin complex
B. If `Delta_(0) gt P` , the configuration is `t_(2 g)^(3) e_(g) ^(1)` = strong field ligand and low spin complex
C. if `Delta_(0) gt P` , the configuration is `t_(2g)^(4) e_(g)^0 `= strong field ligand and high spin complex
D. if `Delta_(0) = P` , the configuration is `t_(2g)^(4) e _(g)^(0)` = strong field ligand and high spin complex .

Answer 1

Correct Answer - A
If CFSE `(Delta)_(0) lt P` (Energy required for pairing) , the electrons do not pair up and fourth electron goes to `e_(g)` of higher energy . Hence , high spin complex is formed . Pairing of electrons does not take place in case of weak field ligands .