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Figure 1 . View of the two independent half-molecules in the title compound, showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. Unlabelled atoms in the molecule containing Ni1 are at the symmetry position (−x, 2 − y, −z) and those in the other molecule are at (2 − x, 1 − y, 1 − z). |