Ferrocene

The following is a model of the sandwich compound ferrocene. The thin magenta lines connecting the central iron atom (orange colored) to the carbon atoms of the rings represent partial bonds, which are essentially an average of the covalent and coordinate bonds that hold this molecule together.
The molecule can be rotated by clicking on the structure and dragging the mouse. Holding the shift key during this operation allows zooming.

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Wilkinson's Catalyst

In the following models, trimethylphosphines have been substituted for the triphenylphosphines that are present in the actual complex. The magenta colored rhodium atom is in the center, chlorine is green, phosphorous is orange and hydrogen is cyan.
The molecules can be rotated by clicking on the structure and dragging the mouse. Holding the shift key during this operation allows zooming.


H2

-H2

Initial Form

After Oxidative Addition of H2
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