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A S 8 ‐like [Sb 8 ] 8− Zintl Anion in the Ammoniate [K 17 (Sb 8 ) 2 (NH 2 )] · 17.5NH 3
Author(s) -
Reil Markus,
Korber Nikolaus
Publication year - 2007
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700272
Subject(s) - antimony , liquid ammonia , crystallography , chemistry , ion , crystal structure , space group , zintl phase , x ray crystallography , ammonia , analytical chemistry (journal) , inorganic chemistry , physics , diffraction , organic chemistry , chromatography , optics
The ammoniate [K 17 (Sb 8 ) 2 (NH 2 )] · 17.5NH 3 was synthesized by reduction of antimony with potassium in liquid ammonia. Single crystals were isolated and characterized by low temperature X‐ray structure analysis. [K 17 (Sb 8 ) 2 (NH 2 )] · 17.5NH 3 crystallizes in the space group P 2 1 / c (No. 14) with a = 12.976(1) Å, b = 24.536(1) Å, c = 22.858(1) Å and β = 99.17(1)°. The ammoniate contains crown‐shaped [Sb 8 ] 8− Zintl anions which are analogous to S 8 rings. The presence of amide NH 2 − as an additional anion is deduced from coordination observations and the close similarity of structural features to the structure of KNH 2 .