Novel Sn(II) complex forms a structured framework through unique interactions, revealing geometry and assembly features.
We report the preparation and structural characterization of a novel mononuclear Sn(II) complex, [Sn(HBA)2(H2O)3]·7H2O (1), synthesized from Sn2+ ion and bromanilic acid (H2BA). Complex 1 has a rare seven-coordinate geometry among Sn(II)-based complexes. In the crystal structure, intermolecular π–π interactions and hydrogen bonding result in helical columnar assemblies, which further organize into a supramolecular three-dimensional framework structure with capsule-shaped voids.
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Ishikawa et al. (2026) studied this question.
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