Polyhedral Members of the Mg<sub>2</sub><i><sub>n</sub></i>P<sub>2</sub><i><sub>m</sub></i> Family Derived from Dimeric Magnesium Trialkylsilylphosphandiide
收藏资源简介：
The magnesiation of tri(tert-butyl)silylphosphane in THF yields tetrameric (tetrahydrofuran-O)magnesium tri(tert-butyl)silylphosphandiide 1. The central moiety is a slightly distorted Mg4P4 cube with tetracoordinate magnesium and phosphorus atoms. The reaction of dibutylmagnesium with H2PSitBu3 in toluene gives tetramagnesium tetrakis[μ-tri(tert-butyl)silylphosphanide] bis[μ4-tri(tert-butyl)silylphosphandiide] 2. The central fragment is a Mg4P2 octahedron with the phosphorus atoms in a trans position. The Mg···Mg edges are bridged by the phosphanide substituents. Crystallographic data of 1: C68H148Mg4O5P4Si4, monoclinic, P21/c, a = 13.454(1) Å, b = 26.123(1) Å, c = 24.539(2) Å, β = 96.53(1)°, Z = 4; crystallographic data of 2: C72H166Mg4P6Si6, monoclinic, P21/n, a = 13.951(1) Å, b = 14.269(1) Å, c = 24.209(2) Å, β = 102.415(1)°, Z = 2.
