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Figure 4
Part of the crystal structure of (II)[link], showing the formation of a chain of R21(7) rings along [001]. For the sake of clarity, H atoms not involved in the motifs shown have been omitted. Atoms marked with an asterisk (*), a hash symbol (#), a dollar sign ($) or an ampersand (&) are at the symmetry positions (x, [{3\over 2}] − y, −[{1\over 2}] + z), (x, y, −1 + z), (x, [{3\over 2}] − y, [{1\over 2}] + z) and (x, y, 1 + z), respectively.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 66| Part 3| February 2010| Pages o141-o146
doi:10.1107/S0108270110005032
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