Synthesis and chemico-physical characterization of tin(IV) complexes with some crown ethers

fac-Aqua(2-carboxyethyl-κ2C,O)trichloridotin(IV)–1,4,7,10,13-pentaoxacyclopentadecane–water (1/1/2)

In the title compound, [Sn(C₃H₅O₂)Cl₃(H₂O)]·C₁₀H₂₀O₅·2H₂O, the Sn^IV atom is octa­hedrally coordinated within a fac-CO₂Cl₃ donor set, arising from the C,O-bidentate carboxy­ethyl ligand, a water mol­ecule and three chloride ligands. In the crystal, supra­molecular chains linked by O—H⋯O hydrogen bonds propagate along the c axis These chains are connected into layers in the ac plane via C—H⋯O inter­actions.

fac-(2-Amido-ethyl-κC,O)aqua-tri-chlorido-tin(IV) 1,4,7,10,13,16-hexa-oxacyclo-octa-decane (2/1)

The asymmetric unit of the title compound, [Sn(C(3)H(6)NO)Cl(3)(H(2)O)](2)·C(12)H(24)O(6), comprises a six-coordinate tin complex and a 18-crown-6 mol-ecule, the latter disposed about a centre of inversion. The tin atom is coordinated by three Cl atoms, that define a facial arrangement, a chelating C-,O- ligand, and a water mol-ecule. The resulting CCl(3)O(2) donor set defines a distorted octa-hedral geometry. The tin-bound aqua ligand forms O-H⋯O hydrogen bonds to the centrosymmetric 18-crown-6 mol-ecule, resulting in a tri-mol-ecular aggregate. These assemble into a supra-molecular chain along the a axis being connected by N-H⋯O hydrogen bonds.