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Figure 2
Three carbon­yl–carbonyl inter­action geometries adapted from Allen et al. (1998BB1): (a) anti-parallel, (b) perpendicular, (c) sheared parallel. The three carbon­yl–carbonyl geometries as they apply to substituted maleic anhydrides: (d) anti-parallel, (e) perpendicular, (f) sheared parallel.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 71| Part 8| August 2015| Pages 950-955
https://doi.org/10.1107/S2056989015013419
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