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Figure 3 Part of the crystal structure showing the formation of π-π stacking interactions of the C⋯Cii and C⋯Nii type connecting free and coordinated bpy molecules [C84⋯C125ii = 3.544 (5) Å, C92⋯C61ii = 3.563 (5) Å, C96⋯C65ii = 3.425 (5) Å, C82⋯N18ii = 3.526 (6) Å and N15⋯C63ii = 3.510 (4) Å. Symmetry code: (ii) −x + 1, y + , −z]. The water molecules and Hbtc anions of crystallization have been omitted for clarity. |