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Updated: Jun 10, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
Pseudomerohedral twinning, pseudosymmetry and complex hydrogen-bonded sheets in
Juan C Castillo1, Rodrigo Abonía, Justo Cobo
1Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia.
Abstract:
The title compound, C(18)H(14)N(2)O(2), crystallizes as a nonmerohedral twin, but the structure can be satisfactorily refined as a merohedral twin, in which a monoclinic unit cell with a cell angle beta close to 90 degrees emulates a metrically orthorhombic cell. The two molecules in the asymmetric unit are very similar in structure and they are related by an approximate pseudo-screw axis. The molecules are linked into complex sheets by a combination of two O-H...N hydrogen bonds and four C-H...O hydrogen bonds.
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