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Back Cover: Detection of the Elusive Highly Charged Zintl Ions Si 4 4− and Sn 4 4− in Liquid Ammonia by NMR Spectroscopy (Angew. Chem. Int. Ed. 16/2013)
Author(s) -
Neumeier Maria,
Fendt Franziska,
Gärtner Stefanie,
Koch Carina,
Gärtner Tobias,
Korber Nikolaus,
Gschwind Ruth M.
Publication year - 2013
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201302288
Subject(s) - tin , chemistry , ion , nuclear magnetic resonance spectroscopy , spectroscopy , ammonia , silicon , analytical chemistry (journal) , liquid ammonia , mass spectrometry , inorganic chemistry , crystallography , stereochemistry , organic chemistry , chromatography , physics , quantum mechanics
Tetrahedral cages of tin and silicon are well‐established in solid compounds of these elements with electropositive metals, but for a long time, doubt remained as to whether the classic Zintl formulation of a complete charge transfer would lead to stable anions if extracted by solvents. In their Communication on page 4483 ff. , N. Korber, R. M. Gschwind, and co‐workers present the detection by NMR spectroscopy of Sn 4 4− and Si 4 4− dissolved in liquid ammonia.