Kristallstrukturelle Untersuchung von Xanthazol-Monohydrat

Summary

The crystal structure of xanthazol monohydrate (Fig. 1) is being investigated. It is triclinic with two molecules per unit cell. Results obtained by the methods ofRogers andWilson show a tendency to centrosymmetry. A complete three dimensional Patterson synthesis, calculated with about 1300 reflexions, yielded a layer structure with the molecules almost parallel (001) and a very short period of 3.14 Å. The different possibilities for the structure were examined by steric considerations and Fourier projections. The figure gives a centric structure in which the water molecule (H₂O_w) shows up quite clearly, and which is considered to be the right one. Very weak additional layer lines indicate some sort of super-structure.