This is a link to MOVIEMOL which was used to generate the molecular images found on this webpage.

These are pictures of molecules that we have observed the microwave spectra of in the Kukolich laboratory....
 
 

This is chloroferrocene. The sandwich style structure is quite rigid, the chlorinated ring is coordinated slightly closer to the iron than the normal cyclopentadienyl group. A detailed analysis of the microwave spectrum of this molecule can be found in the Journal of Inorganic Chemistry Vol. 36 p. 2868, 1997
 
 

This is trithiacyclononane, a dense spectrum indicates that this molecule loses its threefold symmetry upon vaporization, one possible conformation found by ab initio calculations is shown above. The most recent results are shown here. This molecule is known to coordinate to metal centers and stabilize unusual oxidation states, several different structures of the sulfur ring bound to metal atoms have been characterized in the solid state.
 
 

This is cyclopentadienyl rhodium dicarbonyl. The Cp group is shown in profile here and is an internally rotating top, the presence of the carbonyls reduces the Cp group to twofold symmetry and thus produces an extremely rich microwave spectrum.