title: Room-Temperature Synthesis of Thiostannates from {[Ni(tren)]2[Sn2S6]}n.
abstract: The compound {[Ni(tren)]2[Sn2S6]}n (1) (tren = tris(2-aminoethyl)amine, C6H18N4) was successfully applied as source for the room-temperature synthesis of the new thiostannates [Ni(tren)(ma)(H2O)]2[Sn2S6]·4H2O (2) (ma = methylamine, CH5N) and [Ni(tren)(1,2-dap)]2[Sn2S6]·2H2O (3) (1,2-dap = 1,2-diaminopropane, C3H10N2). The Ni-S bonds in the Ni2S2N8 bioctahedron in the structure of 1 are analyzed with density functional theory calculations demonstrating significantly differing Ni-S bond strengths. Because of this asymmetry they are easily broken in the presence of an excess of ma or 1,2-dap immediately followed by Ni-N bond formation to N donor atoms of the amine ligands thus generating [Ni(tren)(amine)](2+) complexes. The chemical reactions are fast, and compounds 2 and 3 are formed within 1 h. The synthesis concept presented here opens hitherto unknown possibilities for preparation of new thiostannates.
authors.affiliation: Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel , Max-Eyth-Str. 2, 24118 Kiel, Germany.
authors.forename: Jessica
authors.initials: J
authors.lastname: Hilbert
authors.affiliation: Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel , Max-Eyth-Str. 2, 24118 Kiel, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Näther
authors.affiliation: Institute of Inorganic Chemistry, University of Regensburg , Universitätsstraße 31, 93040 Regensburg, Germany.
authors.forename: Richard
authors.initials: R
authors.lastname: Weihrich
authors.affiliation: Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel , Max-Eyth-Str. 2, 24118 Kiel, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Bensch