iwhy crystallography is must for find conformation of molecules?except nmr? is it any other source for find o

Answer 1

Please in the future try to phrase your question better, I really have very little idea about what you are trying to ask

And what is NMR

I think you are asking about crystallograhy being used to determin if a substance is made up of molecules... It is silmple a good technique for it... It helps confirm if a substance has crystal properties... that would mean that it it made up of peices that have a defined shape and make a reproducible pattern

Answer 2

If I have understood your question you´d like to know if the crystallography is the unique structural method to determine the conformation of molecules and why crystallography does. In first place NMR (nuclear magnetic resonance) is not able to determine the conformation of a molecule because the model which is built with a NMR approach is an average of the multiples conformations that the molecule can adopt in solution so you couldn´t see an unique conformation, by other hand when x-ray structure has been solved we can see the conformation of this molecule in its solid state (this is something important, you must think that a lot of molecules hasn´t the same properties in solid state than in solution), with regard to if there are another technique to find the conformation of a molecule the answer is yes, but..... what sort of molecule?.... an organic compound, a protein, an inorganic compound or maybe a combination.

Answer 3

Because the Xrays are scattered by the electrons. You can extract the crystal system, the basis (molecular) structure, as well as electron densities from the scattering pattern--this information is contained in the "form factors" of the scattering.