Figure 2
The coordination polyhedron of the Sr metal ion. Symmetry codes for the base rectangle atoms are: N1 and O2 at (−x + 1, −y + 1, −z + 1), N2 and O6 at (−x + 2, −y + 1, −z + 1). For the upper rectangle: O9 is at (x − 1, y, z) and O5 is at (x + 1, y, z). |