The molecular structure of hexaborane(12) in the gas phase as determined by electron diffraction
- 1 January 1988
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 2335-2339
- https://doi.org/10.1039/dt9880002335
Abstract
The structure of gaseous arachno-B6H12, the only simple binary borane for which crystallographic data are not available, has been determined by electron diffraction. The analysis showed unequivocally that the molecule has C2 symmetry, with two BH2 terminal groups, four other terminal hydrogen atoms, and four bridging hydrogen atoms, two of which are asymmetric. Models with Ci or Cs symmetries gave unsatisfactory R factors, and were rejected. The boron framework is a chiral six-atom fragment of a closed triangular dodecahedron from which two adjacent five-connected vertices have been removed. The results establish a clear structural relationship between the three arachno boranes B4H10, B5H11, and B6H12.Keywords
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