Hydrogen Polyphosphides P₃H₂³⁻and P₃H₃²⁻: Synthesis and Crystal Structure of K₃(P₃H₂)·2.3NH₃, Rb₃(P₃H₂)·NH₃, [Rb(18-crown-6)]₂(P₃H₃)·7.5NH₃, and [Cs(18-crown-6)]₂(P₃H₃)·7NH₃

Abstract

The incongruous solvation of polyphosphides and phosphanes or the direct reduction of white phosphorus in liquid ammonia leads to the hydrogen polyphosphides catena-dihydrogen triphosphide, P(3)H(2)(3-), and catena-trihydrogen triphosphide, P(3)H(3)(2-), in the crystalline compounds K(3)(P(3)H(2)).2.3NH(3) (1), Rb(3)(P(3)H(2)).NH(3) (2), [Rb(18-crown-6)](2)(P(3)H(3)).7.5NH(3) (3), and [Cs(18-crown-6)](2)(P(3)H(3)).7NH(3) (4).