Molecular and Crystal Structure of B20H16

Abstract
A single‐crystal three‐dimensional x‐ray diffraction study has established the chemical composition and molecular structure of B20H16, which has D2d symmetry. Two B10H14 cages are joined together at the open faces, with the loss of all bridge H atoms, and loss of terminal H atoms on the four B atoms which join these cages. There are eight molecules in the tetragonal unit cell which has dimensions of a=9.650 and c=29.64 Å. The space group is I41/acd, and the molecules occupy sites of symmetry S4.

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