Crystal field stabilization energy for high spin d ^4 octahedral complex is

Step-by-step solution

Key Idea:- In case of high spin complex, ₀ is small. Thus, the energy required to pair up the fourth electron with the electrons of lower energy d-orbitals would be higher than that required to place the electrons in the higher d-orbital. Thus, pairing does not occur. For high spin d ^4 octahedral complex, Crystal field stabilisation energy aligned & =(-3 0.4+1 0.6) _ & =(-1.2+0.6) ₀ & =-0.6 ₀ aligned