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A solid-state dehydration process associated with a significant change in the topology of dihydrogen phosphate chains, established from powder X-ray diffraction

Albesa-Jove, D., Zhigang, Pan, Harris, Kenneth David Maclean and Uekusa, H. A solid-state dehydration process associated with a significant change in the topology of dihydrogen phosphate chains, established from powder X-ray diffraction. Crystal Growth & Design 8 (10) , pp. 3641-3645. 10.1021/cg800226e

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Abstract

The anhydrous crystalline phase of chloroquine bis-(dihydrogen phosphate) is obtained by dehydration of the corresponding hydrate phase, but in common with many solid-state dehydration processes, the product is obtained as a polycrystalline powder, thus limiting the opportunity to carry out structural characterization using single crystal X-ray diffraction techniques. Instead, structure determination of the anhydrous phase has exploited the capabilities of modern powder X-ray diffraction techniques, employing the direct-space Genetic Algorithm technique for structure solution followed by Rietveld refinement. The results reveal that the dehydration process is associated with a significant change in the topology of hydrogen bonded chains of dihydrogen phosphate anions, arising from a change in the hydrogen bonding arrangement within the chains, together with a significant change in the conformation of the chloroquine cation.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Chemistry
Subjects: Q Science > QD Chemistry
Publisher: ACS Publications
ISSN: 1528-7483
Last Modified: 04 Jun 2017 01:54
URI: http://orca.cf.ac.uk/id/eprint/5835

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