5. Ulusal Kristalografi Toplantısı

What The 5th National Crystallography Meeting Offers?

Participants will be given an invitation letter.
Participants will be given a certificate of participation.
There will be an award ceremony at the end of the conference.
All articles will go through the referee process.
Tour will be organized to touristic places in the city center.

About Workshop:

Prof. Dr. Peter Müller from MIT (Massachusetts Institute of Technology) will conduct a workshop titled “Refining Disorders in Single-Crystal X-Ray Diffraction – Using Restraints the Right Way” after his speech. If you bring your personal laptop with you to the workshop, you can participate hands-on. Required programs: Any graphical interface such as XL, Olex2, Wingx that can run SHELX.

Prof. Müller’s workshop content is as follows:

Although widely regarded as one of the most powerful tools of three-dimensional structure elucidation, single-crystal x-ray diffraction has its limitations.  The need for a high-quality single crystal is perhaps the most obvious weakness, however a more subtle yet serious issue poses the lack of understanding about the method itself.  Because the final product of a crystal structure determination gives rise to a beautiful photorealistic rendering of the atomic model that looks just like a photograph of the molecule, scientist and laypersons alike tend to uncritically believe what they see, thus overestimating the powers of the method.  The most fundamental misunderstanding, probably, lies in the circumstance that x-ray diffraction is not a spectroscopic method.  That means one does not record individual responses from atoms or functional groups but rather the Fourier transformation of the complete electron density function in the unit cell.  A crystal structure comprises the spatial and temporal average over the whole crystal and the full duration of the diffraction experiment, which gives rise to challenges such as twinning or disorder.  Powerful as the method may be, crystal structure determination is complex and not usually trivial.  In order to learn the most from a given diffraction experiment, one has to thoroughly understand the method and one has to carefully and skillfully perform every step of structure determination.  This presentation will discuss a case where, perhaps, the wish was father to the structure more than an honest interpretation of the diffraction data; and, certainly, a better understanding of the method could have prevented the publication of a paper of dubious value.