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( Z ,2 R ,3 R ,4a R ,7 R ,12a S )-2,3,7,8,12,12a-Hexahydro-2,3-dimethoxy-2,3,7-trimethyl-4a H -[1,4]dioxino[2,3-c]oxecin-5(11 H )-one: a commensurate occupationally modulated structure revealing a condition for diffraction symmetry enhancement for non-parent reflections

Rae, A David; Willis, Anthony; Loong, David; Banwell, Martin


(Z,2R,3R,4aR,7R,12aS)-2,3,7,8,12,12a-Hexahydro-2,3-dimethoxy-2,3, 7-trimethyl-4aH-[1,4]dioxino[2,3-c]oxecin-5(11H)-one (dengue) crystallizes in the space group P31 and approximates the conditions necessary for diffraction symmetry enhancement without twinning for the h - k ≠ 3N reflections. The structure may be described as an occupancy modulation of a 1:1 disordered P3121 parent structure with Z = 3 that would only contribute to the h - k = 3N reflections. The crystal studied was a 0.717...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Acta Crystallographica Section B: Structural Science
DOI: 10.1107/S0108768105041650


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