Nine new molybdato adducts and complexes have been synthesized and studied by infrared spectroscopy. The suggested structures are discrete or infinite chain, the molybdate behaving as a bidentate, mono-, bi- or tetrachelating ligand, the environment around the tin (IV) centre being octahedral or trigonal bipyramidal. In water containing compounds, when extra intermolecular O-H…O or O-H…Cl hydrogen bonds are considered, supramolecular architectures may be obtained.
