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 + , y − , −z + ; (ii) −x + , y + , −z + ; (iii) −x + 1, −y, −z + 1; (iv) −x, −y + 1, −z + 1. |