X-Ray Crystallography Collaborator
We have another collaborator who is comfortable with working openly: Matthias Zeller from Youngstown State University.
With the fastest turnaround for any crystal structure analysis I've ever submitted, we now have the structure for the Ugi product UC-150D. For a nice picture of the crystals see here.
Although NMR supports our structure assignments, there is not enough proximity between the hydrogens to assign them all by walking through the couplings. Yes, high resolution mass spectrometry is a nice confirmation. But nothing beats the confidence a chemists gets from an X-ray crystal structure.
Here is a pic of UC-150D - for all the raw data files take a look at the lab notebook page EXP150. Notice the pi-stacking of the aromatic rings.