Java Security Settings:
      This web page employs Java, which requires specific security settings for correct operation.
      If the applets on this page do not run correctly, consult the Virtual Chemistry Experiments FAQ
      or the Physlet Physics web site for establishing the correct security settings.

Molecular Orbitals of Zn(NH3)42+

The Ligand Field Theory energy diagram for Zn(NH3)42+ is shown below. Clicking on an orbital in the energy diagram displays the 90% isosurface for that orbital in the virtual reality display.

Examine the molecular orbital diagram for NH3 and identify the donor orbital for coordination to metals. (This orbital is the highest occupied molecular orbital.)

The NH3 ligand is not capable of π bonding; thus coordination involves only σ bonding. In addition to the Zn2+ 3d orbitals, the 4d and 4p orbitals are also included in the energy diagram. For this complex, the 3dxz and 4py orbitals and the 3dyz and 4px orbitals have the same symmetry properties with respect to the ammine ligands. Thus 3dxz and 4py mixing and 3dyz and 4px mixing is possible.

For each molecular orbital

  1. Identify the metal and ligand orbitals that mix to form the molecular orbital.
  2. Identify whether the molecular orbital is σ, σ*, or n in character.
  3. Identify whether the molecular orbital has primarily metal or ligand character.

Write the electron configuration for this complex.

How many unpaired electrons are there?

Is the complex paramagnetic or diamagnetic?

Molecular Orbital Diagram of ZnNH3

View Along:        





This page requires Java3D. If an applet on this page is not visible, consult the Java3D FAQ.
Drag with the left mouse button to rotate, the center button to zoom, and the right button to move the object.




NH3     Ag(NH3)2+     Co(NH3)63+     Cu(NH3)42+     Zn(NH3)42+    




Coordination Chemistry Home Page
Virtual Chemistry Experiments Home Page



ZnNH3.html version 1.1
© Copyright 2009-2014 David N. Blauch