CORRELATION DIAGRAM

IT INCLUDE ORGEL DIAGRAM AND TANABE SUGANO DIAGRAM EASY NOTES.IT WOULD BE TO HELPFUL TO STUDENTS.

1. CORRELATION DIAGRAM Correlation Diagram Are The Plots Which Relates Energies Of Terms To The Field Strength. Orgel Diagram, Tanabe Sugano Diagram And Walsh Diagram Are Correlation Diagram.

2. Orgel diagram When metal is placed in L field there is spilitting of energy levels which can be expressed by orgel diagram. Correlation diagram Follows spin allowed transition. High spin complexes dn and dn+5 have same orgel diagram. Dx(octahedral)=d10-x(tetrahedral)

3. Correlation of spectroscopic terms into Mulliken symbol

4. Energy ligand field strength d 1  d 6 d 4  d 9 Orgel diagram for d 1 , d 4 , d 6 , d 9 D D D d 4 , d 9 tetrahedral T 2g E g d 4 , d 9 octahedral d 1 , d 6 tetrahedral E g T 2g d 1 , d 6 octahedral For D term

5. F P Ligand field strength ( Dq ) Energy Orgel diagram for d 2 , d 3 , d 7 , d 8 ions d 2 , d 7 tetrahedral d 2 , d 7 octahedral d 3 , d 8 octahedral d 3 , d 8 tetrahedral A 2g T 1g (F) T 2g A 2g T 2g T 1g (F) T 1g (P) T 1g (P) For F term

6. CONCLUSION Orgel Diagram Is A Plot Of Energy Of Possible D Orbital Configuration Vs Ligand Field Strength. For D Term-only 1 Transition Is Allowed ( Eg To T2g Or T2g To Eg ) F Term-3 Transition Allowed(t1g T2g,t1g(f) T1g(p),t1g A2g)

7. Tanabe Sugano diagram Correlation Diagram Plotted B/W Ligand Field Spitting(in Terms Of O/B ) And Energy(in Terms Of E/B). For Both High And Low Spin Complexes. Spin Forbidden Also Allowed. The Ground State Term Is Taken As Reference And Another Terms Are Plotted W.R.T. Ground State Term. Racah parameter-describes various aspects of inter electronic repulsion Types-A,B,C B is most imp used in T.S. diagram and describe indivisual d repulsion

8. ADVANTAGES Applicable When 10dq > E Repulsion To Predict E Transition Analysing Uv-visible Spectra. To Calculate Dq Values For Ligand Field Spiltting.

9. THANK YOU HEAD OF DEPARTMENT DR A.K. MISHRA GUIDED BY DR SAROJ SHARMA NAME-KHUSHI GANJIR CLASS-MSC(2 ND )