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Structural and thermal characterization of zolpidem hemitartrate hemihydrate (form E) and its decomposition products by laboratory x-ray powder diffraction

✍ Scribed by Ivan Halasz; Robert E. Dinnebier

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 299 KB
Volume: 99
Category: Article
ISSN: 0022-3549
DOI: 10.1002/jps.21883

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✦ Synopsis

The crystal structure of zolpidem hemitartrate hemihydrate (I, Form E) has been solved from high-resolution laboratory powder diffraction data. It crystallizes in the orthorhombic P2(1)2(1)2(1) space group with a = 22.4664(6) A, b = 26.0420(7) A, and c = 7.4391(1) A. Protonation of zolpidem molecules could not be unambiguously determined. Thermal stability of Form E has been investigated by TG-DTA and in situ by temperature resolved X-ray powder diffraction. Water loss occurs between 50 degrees C

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