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The compounds (NH 4 ) 3 AsS 4 · 5 NH 3  (1) and (NH 4 ) 3 SbS 4 · 8 NH 3  (2) were prepared by the reaction of Na 3 AsS 4  and Na 3 SbS 4  with a proton-charged ion exchange material in liquid ammonia and characterized by low temperature single crystal X-ray structure analysis. The ammonium-ammoniates show H 3 N-H···N-hydrogen bonds between the ammonium ion and ammonia molecules ranging from 1.86 to 2.55 Å (DHA-angles: 145 - 173°) and H3N-H···S-bonds to the thioanions between 2.36 and 2.97 Å (DHA-angles: 130 - 176°). The former of the interactions are responsible for the formation of [(NH 3 ) 2 H] + , [(NH 3 ) 3 H] +  and [(NH 3 ) 4 H] + -complexes, the last two of which were characterized by X-ray analysis for the first time.

zeitschrift für naturforschung b

Erstmalige Charakterisierung der Ammoniak-Proton-Komplexe [(NH 3 ) 3 H] +  und [(NH 3 ) 4 H] +  in den Kristallstrukturen von (NH 4 ) 3 AsS 4  · 5 NH 3  und (NH 4 ) 3 SbS 4  · 8 NH 3  / First Characterization of the Ammonia-Proton-Complexes [(NH 3 ) 3 H]+ and [(NH 3 ) 4 H] +  in the Crystal Structures of (NH 4 ) 3 AsS 4  · 5 NH 3  and (NH 4 ) 3 SbS 4  · 8 NH 3