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Figure 2 . Diagram showing the supramolecular association of the betainic acid and water molecules of I in layers perpendicular to [−1 0 1]; symmetry codes: (A) x +1/2, y – 1/2, z −3/2; (B) x + 1/2, –y + 3/2, z + 1/2 (C) –x + 1, –y + 1, –z + 2; (D) x + 1, y, z + 1; (E) –x + 3/2, y – 1/2, –z + 5/2; the atoms of the unlabeled left part of the figure are generated by translation along [0 0 − 1]. |