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Figure 2
The hydrogen-bonding scheme around the two unique anions (left and right). For clarity, the H atoms of the aromatic ring are not shown. The hydrogen-bonding environment of the dication (middle) shows only the acceptor oxygen atoms of the unique anions. Symmetry codes: (i) x, y + 1, z; (ii) −x + 1, −y + 1, −z + 1; (iii) −x + 1, −y, −z + 1; (iv) x, y − 1, z.

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