Abstract
AbstractThe syntheses and X‐ray single‐crystal low‐temperature structures of the four new ammoniates [Li(NH3)4]3As7⋅NH3 (1), [Rb(18‐crown‐6)]3As7⋅8 NH3 (2), Cs3As7⋅6 NH3 (3), and (Ph4P)2CsAs7⋅5 NH3 (4) are reported. The compounds were obtained by either direct reduction of As with Li/Cs in liquid NH3, solvation of Cs4As6/Rb4As6 in liquid NH3, or by extraction of solid Cs3As7. While compound 1 contains isolated As$\rm{_{7}^{3-}}$ polyanions, AsM contacts (M=Na−Cs) lead to neutral [Rb(18‐crown‐6)]3As7 units in 2, a three‐dimensional, extended network in 3, and one‐dimensional, infinite $\rm{_{\infty }^{1}}$[CsAs7]2− chains in 4, respectively.
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