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Figure 6
The inter­molecular N1—H1⋯N2 hydrogen bonds in (III)[link] (dotted lines), forming chains of equivalent mol­ecules aligned exactly with the ac diagonal of the unit cell, resulting in a twofold helix along the [101] direction. Compound (IV)[link] is isomorphous with (III)[link]. Ellipsoids are shown at the 30% probability level. [Symmetry codes: (i) x − [{1\over 2}], −y + [{1\over 2}], z − [{1\over 2}]; (iii) x + [{1\over 2}], −y + [{1\over 2}], z + [{1\over 2}]; (iv) x + 1, y, z + 1.]

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 67| Part 8| July 2011| Pages o273-o277
doi:10.1107/S0108270111023985
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