Bulk X-ray crystallography

Single-crystal surfaces are characterized by a set of Miller indices that indicate tlie particular crystallographic orientation of the surface plane relative to the bulk lattice [5]. Thus, surfaces are labelled in the same way that atomic planes are labelled in bulk x-ray crystallography. For example, a Ni (111) surface has a surface plane... 

Although the preparation of bulk quantities of free cydo-Qg remains elusive, one of its transition metal complexes has been prepared and characterized by X-ray crystallography.11,281 Its synthesis benefited from the fact that alkynes can be protected with Co2(CO)8 to give (p-acetylene)dicobalt hexacar-bonyl complexes having dramatically reduced... 

In 2001, Schumann and co-workers reported a similar set of metallocene complexes with l,3-di- o-propyl-4,5-dimethylimidazoly-2-ylidene.22 X-ray crystallography and NMR studies confirmed a similar trend between metal-carbene bond strength and alkaline earth metal as that found by Arduengo and co-workers. Additionally they showed that as the steric bulk of the cyclopentadienyl ligand increases the metal-carbene bond distance is elongated. 

The mission of this institute is basic biomedical research, and it provides an environment for individuals to carry out independent research in this area. Our primary support comes from government granting agencies — NIH, NSF, NASA. We have a total of 65 people, 25 Ph.D. s among them. The bulk of our research is X-ray crystallography. 

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