ja027241m_si_001.pdf (44.83 kB)
Barium Azacryptand Sodide, the First Alkalide with an Alkaline Earth Cation, Also Contains a Novel Dimer, (Na2)2-
journal contribution
posted on 2003-01-29, 00:00 authored by Mikhail Y. Redko, Rui H. Huang, James E. Jackson, James F. Harrison, James L. DyeThe 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.