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Updated: Jul 19, 2026

Synthesis of 1,2-Azaborines and the Preparation of Their Protein Complexes with T4 Lysozyme Mutants
Published on: March 25, 2017
Molecular structures of arachno-heteroboranes with decaborane frameworks: two Cs-symmetrical azacarba- and
Drahomír Hnyk1, Josef Holub, Stuart A Hayes
1Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25068 Rez, Czech Republic.
Abstract:
The gas-phase structure of 6,9-CSB8H12 has been determined by electron diffraction and ab initio calculations, and that of 6,9-CNB8H13 has also been calculated. The accuracy of each structure has been confirmed by 11B NMR calculations. The position of the sulfur atom is very close to that of the boron atom occupying the equivalent position in the parent molecule [B10H14](2-), reflecting the similarity of sizes of sulfur and boron atoms. The nitrogen and carbon atoms, on the other hand, lie much closer to the centers of the cages. The B8-X9-B10 angles increase from 98.7 degrees for X = S to 122.8 degrees for X = N. There are also large changes in relative lengths of bonds, with some bonds lengthening by up to 14.6 pm on introduction of a sulfur atom.
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