Barium Azacryptand Sodide, the First Alkalide with an Alkaline Earth Cation, Also Contains a Novel Dimer, (Na2)2-
- 29 January 2003
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 125 (8), 2259-2263
- https://doi.org/10.1021/ja027241m
Abstract
The first barium sodide, with stoichiometry Ba2+(H5Azacryptand[2.2.2]-)Na-·2MeNH2, was synthesized by the reaction of Ba, Na, and H6Azacryptand[2.2.2] in NH3−MeNH2 solution. It was characterized by X-ray crystallography, 23Na MAS NMR, hydrogen evolution, DSC, optical spectroscopy, and magnetic susceptibility. This is the first sodide in which the sodium anions form (Na2)2- dimers. Previous theoretical predictions were verified by a calculation of the potential energy curve for the dimer in the field of the surrounding charges, whose positions were determined from the crystal structure.Keywords
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