Eine neue Synthese und die Kristallstruktur von Hexaphenyl-cyclo-triphosphazen, [NPPh2]3 · THF

Abstract

A New Synthesis and the Crystal Structure of Hexaphenyl-cyclo-triphosphazene, [NPPh2]3 · THF [NPPh2]3 · THF (1 · THF) has been prepared from KNPPh3 in THF solution in the presence of MoO3 and 18-crown-6. According to the crystal structure determination all structural parameters are similar to known symmetric substituted cyclo-triphosphazenes. The dihedral angles of the phenyl groups with the “best plane” P3N3 lie between 50 and 67°. 1 · THF: Space group P 1, Z = 2, lattice dimensions at –80 °C: a = 1146.5(1), b = 1360.5(1), c = 1382.9(1) pm, α = 108.06(1)°, β = 103.32(1)°, γ = 112.19(1)°, R1 = 0.0441.