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Figure 1
The mol­ecular structures of (a) (I), (b) (II), (c) (III) and (d) (IV). Displacement ellipsoids are drawn at the 50% probability level. In (III)[link] and (IV)[link], disordered atoms are labelled with suffixes A and B.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 75| Part 1| January 2019| Pages 1-7
https://doi.org/10.1107/S2053229618016467
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