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Figure 2
The crystal structure of (I)[link], showing (a) the hexa­gonal layer parallel to the (10[\overline{1}]) plane (H atoms have been omitted for clarity) and (b) a fragment of the spatial arrangement of the centres of gravity of mol­ecules of (I)[link], illustrating the three-layered fcc packing motif. Upper, medium and lower levels are shown as dark-, medium- and light-grey balls, respectively. Solid and dashed lines show the intra- (hydrogen bonding) and inter­layer (van der Waals) distances between the mol­ecular centres.

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CHEMISTRY
ISSN: 2053-2296
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