Zusammenfassung
The syntheses and X-ray single-crystal low-temperature structures of the four new ammoniates [Li(NH3)(4)](3)AS(7) (.) NH3 (1), [Rb(18-crown-6)](3)AS(7) (.) 8 NH3 (2). CS(3)AS(7)(.)6 NH3 (3), and (Ph4P)(2)CsAS(7)(.)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 ...
Zusammenfassung
The syntheses and X-ray single-crystal low-temperature structures of the four new ammoniates [Li(NH3)(4)](3)AS(7) (.) NH3 (1), [Rb(18-crown-6)](3)AS(7) (.) 8 NH3 (2). CS(3)AS(7)(.)6 NH3 (3), and (Ph4P)(2)CsAS(7)(.)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-7(3-) polyanions, As-M contacts (M-Na-Cs) lead to neutral [Rb(18-crown-6)](3)As-7 units in 2, a three-dimensional, extended network in 3, and one-dimensional, infinite, (1)(infinity)[CsAS(7)](2-) chains in 4, respectively.
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