Organometallic Chemistry-Crystal Field theory.pptx

Organometallic Chemistry-Crystal Field theory

1. Organometallic Chemistry Muh Rizal B., S.Si.,M.Sc 2025 Department of Chemistry Faculty of Science and Technology [email protected] (085340680656)

2. Fakultas Sains dan Teknologi-Universitas Jambi

3. Fakultas Sains dan Teknologi-Universitas Jambi In crystal field theory, the electron pairs on ligands are viewed as point negative charges that interact with the d- orbitals on the central metal. Focuses on d- orbital Assumes ionic bonding = electrostatic interactions Model for bonding in transition metal complexes: Accounts for observed properties of transition metal complexes Explaining several magnetic properties, colors in complex compounds

4. Fakultas Sains dan Teknologi-Universitas Jambi ligand ligand

5. Fakultas Sains dan Teknologi-Universitas Jambi

6. Fakultas Sains dan Teknologi-Universitas Jambi These five d-orbitals have the same energy (they are degenerate) when the metal atom exists alone (it does not form a complex). Next, let us consider how the d orbital energies split when ligands are bonded to a transition metal to form a complex. The splitting pattern of the d orbitals depends on how many ligands coordinate and their geometric arrangement around the transition metal splitting occurs because electrons from the d orbital and from the ligand repel each other

7. Fakultas Sains dan Teknologi-Universitas Jambi t 2 g : lower-energy orbitals e g : higher-energy orbitals the energy difference between them is known as the crystal field splitting parameter, denoted as 10 Dq or   - 0.4 = - 4 Dq   + 0.6 = + 6 Dq   has a position farther from the ligands, resulting in a smaller repulsive force

8. Fakultas Sains dan Teknologi-Universitas Jambi

9. Fakultas Sains dan Teknologi-Universitas Jambi Orbitals splitting

10. Fakultas Sains dan Teknologi-Universitas Jambi

11. Fakultas Sains dan Teknologi-Universitas Jambi Weak ligands

12. Fakultas Sains dan Teknologi-Universitas Jambi

13. Fakultas Sains dan Teknologi-Universitas Jambi

14. Fakultas Sains dan Teknologi-Universitas Jambi CFSE= e- (-4Dq) + e- (+6Dq) or CFSE = e- (-0.4 + e- (+0.6  

15. Fakultas Sains dan Teknologi-Universitas Jambi

16. Fakultas Sains dan Teknologi-Universitas Jambi

17. Fakultas Sains dan Teknologi-Universitas Jambi Weak ligand strong ligand

18. Fakultas Sains dan Teknologi-Universitas Jambi

19. Fakultas Sains dan Teknologi-Universitas Jambi

20. Fakultas Sains dan Teknologi-Universitas Jambi

21. Fakultas Sains dan Teknologi-Universitas Jambi

22. Fakultas Sains dan Teknologi-Universitas Jambi

23. Fakultas Sains dan Teknologi-Universitas Jambi

24. Fakultas Sains dan Teknologi-Universitas Jambi

25. Fakultas Sains dan Teknologi-Universitas Jambi

26. Fakultas Sains dan Teknologi-Universitas Jambi

27. Fakultas Sains dan Teknologi-Universitas Jambi

28. Fakultas Sains dan Teknologi-Universitas Jambi

29. Fakultas Sains dan Teknologi-Universitas Jambi

30. Fakultas Sains dan Teknologi-Universitas Jambi

31. Fakultas Sains dan Teknologi-Universitas Jambi

32. Fakultas Sains dan Teknologi-Universitas Jambi

33. Fakultas Sains dan Teknologi-Universitas Jambi

34. Fakultas Sains dan Teknologi-Universitas Jambi

35. Fakultas Sains dan Teknologi-Universitas Jambi

36. Fakultas Sains dan Teknologi-Universitas Jambi

37. Fakultas Sains dan Teknologi-Universitas Jambi

38. Fakultas Sains dan Teknologi-Universitas Jambi