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Figure 2 The hydrogen-bonding motifs in the crystal structure of (I). Dashed lines indicate hydrogen bonds and π-π interaction between the dmphen rings of neighboring molecules in the crystal structure of (I)·[Symmetry codes:(B)x, y + 1, z; (C)x, y + 2, z; (D)-x + 1, −y, −z; (E)-x + 1, −y + 1, −z; (F)-x + 1, −y + 2, −z + ] |