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Updated: Aug 14, 2026

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
Published on: February 11, 2012
Stabilization by Hydrogen. Synthetic and Structural Studies of the Zintl Phase Ba(5)Ga(6)H(2)
Robert W. Henning1, E. Alejandro Leon-Escamilla, Jing-Tai Zhao
1Department of Chemistry and Ames Laboratory-DOE,(1) Iowa State University, Ames, Iowa 50011.
Abstract:
Synthesis of the phase formerly reported as Ba(5)Ga(6) succeeds only in the presence of hydrogen. The heavy atom structure of Ba(5)Ga(6)H(2) has been redetermined by single-crystal X-ray diffraction (trigonal P3c1, Z = 2, a = 7.7698(2) Å, c = 14.3902(7) Å), and the hydrogen positions have been elucidated by time-of-flight neutron powder diffraction. The unit cell contains isolated slightly distorted octahedra Ga(6)(8)(-) with barium cations over all edges. Hydride is bound in two types of barium tetrahedra [d(Ba-H) = 2.61-2.62 Å]. The stoichiometry is appropriate for a Zintl phase: (Ba(2+))(5)Ga(6)(8)(-)(H(-))(2).
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