Question

Using the crystal field theory approach, draw the d-orbital splitting diagram for octahedral [Cu(OH2)6+, properly label each of the orbitals (i.e. dky etc.), and fill in the electrons. Show the changes in energy of all the d-orbitals under the influence of Jahn-Teller distortions resulting in both axial elongation and in axial compression (tetragonal distortions).

Answer 1

According to the crystal field theory,

• it assumes metals and ligands as point charges.
• it assumes neutral Ligand as a dipole.
• according to CFT, Octahedral Complex is formed when metal ion is present in the octahedral void formed by the Ligand.

2. 3 d 4s 1レ1レ1レ1レ1 2 Gar eund Stats) (Excited Stata)

JAHN TALLER DISTORTION- According to it, If any metal posses Electronic degeneracy in Octahedral field then it will try to remove its electronic energy by lowering the overall symmetry of the molecule.

Z- OUT DISTORTION/ AXIAL ELONGATION - the energies of d- Orbitals having Z factor i.e. d_xz, d_yz, d_z². are lowered and the bonds along Z- axis elongates.

this type of distortion generally occurred with degenerate e_g level.

e 0 2. Groundstat) 2 dxz dyz Z- out Distertiem/ Axial Elomgatien S 82

Z-IN DISTORTION / AXIALLY COMPRESSED / TETRAGONALY COMPRESSED - the energies of d- orbitals with Z factor i.e.. d_xz, d_yz, d_z² , increased and the bond along Z- axis compressed or shortened.

n, Axial Cempsussien xial E lemaatiem Z - out Distetiem. Tekra gemal bisteien Tetra genal Disteuien