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Figure 5
Ball-and-stick illustration of the crystal structure of (IV)[link], showing the helical arrangement of the alternating constituent moieties around the 21b screw axis, and the extended inter­molecular hydrogen bonding (dashed lines) along it. Additional hydrogen bonds which operate between neighbouring helices (Table 4[link]) are not shown.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 65| Part 12| November 2009| Pages o639-o644
doi:10.1107/S0108270109047519
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