Sketch the splitting of d orbitals in an octahedral crystal field,

In octahedral complexes having co-ordination number 6, the degeneracy of the d-orbitals of central atom is removed due to ligand electron metal electron repulsions. In the octahedral complex three orbitals have lower energy, t_(2g) set and two orbitals have higher energy, eg set. This phenomenon is formed as crystal field splitting and the energy seperation is denoted by Delta_(0) . Thus the energy of the two eg orbitals will increase by (3//5)Delta_(0) and that of the three t_(2g) will decrease by (2//5)Delta_(0) . The erystal field splitling, Delta_(0) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong field and in these cases, the splitting will be large whereas other produce weak fields and consequently result in small splitting of d-orbitals. In an octahedral crystal field, t_(2g) orbitals are

According to CFT the energy of t_(2g) orbitals in an octahedral complex

What is the shape of d-orbital ?

Sketch the shape of s and p-orbital indicating the angular distribution of electrons

Write the CFT splitting of octahedral and tetrahedral complexes.

The ratio of 'd' values in NaCl crystal is

Low spin complex of d^6 - cation in an octahedral field willhave the following energy. ( Delta_0 = crystal field splitting energy in an octahedral field, P= Electron pairing energy)

The n + l value of 3d orbital is

The difference in the number of coulombic exchange pairs for high spin and low spin d^(5) ion in an octahedral complex according to crystal field theory is