Tetraammin‐Lithium‐Kationen zur Stabilisierung phenylsubstituierter Zintl‐Anionen: Die Verbindung [Li(NH₃)₄]₂[Sn₂Ph₄]

Abstract

Tetraammine Lithium Cations Stabilizing Phenylsubstituted Zintl‐Anions: The Compound [Li(NH 3 ) 4 ] 2 [Sn 2 Ph 4 ] Ruby‐red, brittle single crystals of [Li(NH 3 ) 4 ] 2 [Sn 2 Ph 4 ] were synthesized by the reaction of diphenyltin dichloride and metallic lithium in liquid ammonia at −35°C. The structure was determined from X‐ray singlecrystal diffractometer data: Space group, P 1 , Z = 1, a = 9.462(2) Å, b = 9.727(2) Å, c = 11.232(2) Å, α = 66.22(3)°, β = 85.78(3)°, γ = 61.83(3)°, R 1 (F ⩾ 4σF ) = 5.13%, wR 2 (F 0 2 ⩾ 4σF ) = 10.5%, N(F ⩾ 4σF ) = 779, N(Var.) = 163. The compound contains to Sb 2 Ph 4 isosteric centres [Sn 2 Ph 4 ] 2− as anions which are connected to rods by lithium cations in distorted tetrahedral coordination by ammonia. These rods are arranged parallel to one another in the b,c‐plane, but stacked along [100].