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Figure 1 Molecular configuration and atom naming scheme for the BPDS ligand, the three independent potassium coordination polyhedra and the water molecules in the asymmetric unit of (I). Displacement ellipsoids are drawn at the 50% probability level. Dashed lines indicate hydrogen-bonding interactions associated with the water molecules. The two potassium ions (K2, K3) and the four water molecules (O1W–O4W) lie on a crystallographic mirror plane. Symmetry codes: (i) x − 1, y, z; (ii) x − 1, y, z + 1; (iii) x, y, z + 1; (iv) x − , −y + , z; (v) x − , −y + , z + 1; (vi) x − 1, −y, z + 1; (vii) x, −y, z + 1; (viii) x + 1, y, z; (ix) x, −y, z. |