Organoelement substituted ammonia salts. Crystal structures of [HN(SnMe3)3]I, [H2N(SnMe3)2][SnMe3Cl2], and [N(AsMe3)2]Br

Article abstract of DOI:10.1002/zaac.199762301107

The stannylated ammonium salt [HN(SnMe₃)₃]I (1) originates from N(SnMe₃)₃ and ISnMe₃ in n-hexane, while [H₂N(SnMe₃)₂][SnMe₃Cl₂] (2) is formed as a by-product by the conversion of N(SnMe₃)₃ with Gallium(III)chloride in CCl₄. The complex [N(AsMe₃)₂]Br (3) with pentavalent arsenic is synthesized by reaction of AsMe₃Br₂ with N(SnMe₃)₃ in diethyl ether. 1-3 were characterized by IR spectroscopy and by crystal structure analyses. 1: Space group P2₁3, Z = 8; lattice dimensions at -50°C: a = b = c = 1558.7 pm. The structure consists of two symmetry independent ion pairs with N-H ? I hydrogen bridge contacts. 2: Space group Pca2₁, Z = 4; lattice dimensions at -60°C: a = 1373.2, b = 762.2, c = 1951.5 pm. The structure consists of [H₂N(SnMe₃)₂]⁺7 and [SnMe₃Cl₂]^- ions, which are associated to chains via interionic Sn ? Cl contacts. 3: Space group I4₁/a, Z = 8; lattice dimensions at -50°C: a = b = 826.3, c = 3490.9 pm. 3 consists of bromide ions and cations [N(AsMe₃)₂]⁺ with short AsN distances of 175.1 pm along with an AsNAs bond angle of 122.1°.