title: Polymorphism of the CNS active drug Org 13011: the application of high temperature analysis to detect new polymorphs.
abstract: The polymorphism of the CNS active compound Org 13011 was studied using different crystallisation methods (i.e. different solvents and cooling rates). The samples were analysed by Raman, solid state NMR, X-ray powder diffraction (XRPD) and thermal analysis. This led to the characterisation of two crystalline forms A and B. Further high temperature analysis using Raman, XRPD, solid state NMR and DSC revealed another two (high temperature) crystalline forms C and D. The transitions to the high temperature crystalline forms occur at temperatures of about 60 degrees C. This study shows that the application of high temperature experiments is useful and can lead to the discovery of new crystalline forms.
authors: Analytical Chemistry for Development, Organon, P.O. Box 20, 5340 BH, Oss, The Netherlands. peter.vanhoof@organon.com
authors: P
authors: P
authors: van Hoof
authors: R
authors: R
authors: Lammers
authors: R
authors: R
authors: v  Puijenbroek
authors: M
authors: M
authors: v d Schans
authors: P
authors: P
authors: Carlier
authors: E
authors: E
authors: Kellenbach
mesh_terms: D002491:Central Nervous System Agents / Q000737:chemistry*; D003460:Crystallization; D004055:Differential Thermal Analysis; D006358:Hot Temperature; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D010879:Piperazines / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D002491:Central Nervous System Agents; C457859:Org 13011; D010879:Piperazines; D011758:Pyrroles