title: Polyhedral members of the Mg2nP2m family derived from dimeric magnesium trialkylsilylphosphandiide.
abstract: 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[mu-tri(tert-butyl)silylphosphanide] bis[mu 4-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, P2(1)/c, a = 13.454(1) A, b = 26.123(1) A, c = 24.539(2) A, beta = 96.53(1) degrees, Z = 4; crystallographic data of 2: C72H166Mg4P6Si6, monoclinic, P2(1)/n, a = 13.951(1) A, b = 14.269(1) A, c = 24.209(2) A, beta = 102.415(1) degrees, Z = 2.
authors.affiliation: Department Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse 9 (Haus D), D-81377 München, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Westerhausen
authors.forename: M
authors.initials: M
authors.lastname: Krofta
authors.forename: P
authors.initials: P
authors.lastname: Mayer
authors.forename: M
authors.initials: M
authors.lastname: Warchhold
authors.forename: H
authors.initials: H
authors.lastname: Nöth