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Figure 1
The extended asymmetric unit in (a) I and (b) II showing the coordination environment of the Ni atoms and the atom-labeling scheme (displacement ellipsoids are drawn at the 30% probability level). C-bound H atoms are omitted for clarity. Intra­molecular hydrogen bonds are shown as dotted lines. Symmetry codes: (i) −x + [{3\over 2}], y − [{1\over 2}], −z + [{3\over 2}]; (ii) −x + [{3\over 2}], y + [{1\over 2}], −z + [{3\over 2}]; (iii) −x + 1, −y, −z + 1; (iv) −x, −y + 1, −z + 1.

ISSN: 2056-9890
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