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Figure 1 View showing the coordination environments of zinc ions in 1 with the atom labeling scheme. Ellipsoids are drawn at the 30% probability level. Hydrogen atoms on carbon atoms have been omitted for clarity. Symmetry codes: (i) x, y − 1, z; (ii) −x, y, −z + ; (iii) x, −y + 1, z − ; (iv) −x, −y, −z; (v) x, −y + 1, z + . |