inorganic compounds
Open access
The title compound, Li2[Sn(OH)6]·2H2O, is dimorphic. As for the previously described α-modification, the title β-modification crystallizes in the monoclinic system and contains the same primary building units, viz [Sn(OH)6]2− octahedra and [Li(μ2-OH)3(H2O)] tetrahedra. In contrast to the Sn—O bond lengths that are very similar in both modifications, the Li—O bond lengths differ significantly, in particular those involving the water molecule. In the new β-modification, the primary building units are linked into layers parallel to (010). The [Sn(OH)6]2− octahedra (-1 symmetry) form hexagonal nets and the [Li(μ2-OH)3(H2O)] tetrahedra are situated in between, with their apices in an alternating fashion up and down. O—HO hydrogen bonds between OH groups and water molecules exist within the layers as well as between them.
metal-organic compounds
Open access
The title compound, [Sn(C4H9)2(CH3COO)2], was synthesized in order to study the influence of large organic groups on the molecular structure of diorganotin diacetates. The title compound exhibits the same structure type as other diorganotin(IV) diacetates characterized by an unsymmetrical bidentate bonding mode of the two acetate groups to tin. The influence of the t-butyl groups on this molecular structure is expressed in two significant differences: tin—carbon bond lengths are much more longer than in the other diacetates, as are the additional interactions of the acetate groups with the tin atom. Intermolecular interactions are restricted to C—HO ones similar to those in the other diacetates, giving rise to a chain-like arrangement of the molecules with the tin atoms and acetate groups in the propagation plane.