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Perspective views of the ligands: (a) L1, (b) L2, (c) L4, and (d) L5; ellipsoids are drawn at the 50% probability level; hydrogen atoms are shown as spheres of arbitrary radii. The unlabelled part of the molecule is related to the labelled ones using symmetry operations (a) −x, 1 − y, 1 − z, (b), and (d) 1 − x, 2 − y, −z, (c) −x, 1 − y, 2 − z.
