Question

Ligand Field Theory (LFT) in conjunction with the Molecular Orbital Theory (MOT):

-

t_2g in LFT corresponds to                                                                                  

-

e_g in LFT corresponds to

A.	t2gbonding in MOT
B.	t2gnonbonding in MOT
C.	t2gantibonding in MOT
D.	egbonding in MOT
E.	egnonbonding in MOT
F.	egantibonding in MOT

Answer 1

t2g in LFT corresponds to - t2g nonbonding in MOT (option B)

eg in LFT corresponds to - eg antibonding in MOT (option F)

In the case of octahedral complexes, when we examine its MO diagram we find that the electrons initially present in the d-orbitals of the metal will enter into t2 nonbonding and eg antibonding (eg*) molecular orbitals and the difference in energy between the t2g nonbonding and eg* orbitals corresponds to ligand field stabilisation energy (LFSE).