Orbital Structure of Tetrahedral Ammine Zinc +2 (CFT)
Explaining the orbital structure of tetrahedral ammine zinc +2 using Crystal Field Theory (CFT) involves understanding how the ligands interact with the central metal ion and how the d orbitals are affected by this interaction.

Key Points:
- Tetrahedral geometry has 4 ligands arranged symmetrically around the central zinc ion.
- In tetrahedral coordination, the d orbitals of the central metal ion split into two sets: eg and t2g.
- The eg set consists of dx2-y2 and dz2 orbitals, while the t2g set consists of dxy, dyz, and dxz orbitals.
- The ligands approach the central zinc ion along the z-axis, causing repulsion that leads to the splitting of the d orbitals.
- The eg orbitals experience greater repulsion from the ligands compared to the t2g orbitals, leading to a higher energy level for the eg set.

Orbital Filling:
- In tetrahedral ammine zinc +2 complex, zinc has a d10 electronic configuration.
- The d orbitals are completely filled with electrons, with 2 electrons in each of the eg and t2g sets.
- The electrons in the t2g set have lower energy due to less repulsion from the ligands, while the eg set has higher energy.
- This results in a low-spin configuration where electrons prefer to stay in the lower energy t2g set rather than occupy the higher energy eg set.
In summary, the orbital structure of tetrahedral ammine zinc +2 complex under CFT involves the splitting of d orbitals into eg and t2g sets due to ligand-field effects. The completely filled d orbitals in zinc lead to a low-spin configuration where electrons occupy the lower energy t2g set before the higher energy eg set.