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Dilithium hexa-hydroxidostannate(IV) dihydrate, a second monoclinic modification with a layer structure.

ABSTRACT: The title compound, Li2[Sn(OH)6]·2H2O, is dimorphic. As for the previously described ?-modification, the title ?-modification crystallizes in the monoclinic system and contains the same primary building units, viz [Sn(OH)6](2-) octa-hedra and [Li(?2-OH)3(H2O)] tetra-hedra. 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 mol-ecule. In the new ?-modification, the primary building units are linked into layers parallel to (010). The [Sn(OH)6](2-) octa-hedra (-1 symmetry) form hexa-gonal nets and the [Li(?2-OH)3(H2O)] tetra-hedra are situated in between, with their apices in an alternating fashion up and down. O-H?O hydrogen bonds between OH groups and water mol-ecules exist within the layers as well as between them.

SUBMITTER: Kamaha S

PROVIDER: S-EPMC3647783 | biostudies-literature |

REPOSITORIES: biostudies-literature

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