The reaction of decaborane with hydrazoic acid: A novel access to azaboranes

Abstract
The reaction of B10H12(SMe2)2 (1) with HN3 yields arachno‐B10H12(N3)(NH2) (2), a product with a μ‐NH2 group. Compound 2 can be hydrolysed to give the known arachno‐B9H13(NH3) (3). nido‐NB9H11(N3) (4) is formed from 2 by a deprotonation/protonation sequence. The azaborane nido‐NB10H13 (5) is a product of the thermolysis of 2. The structures of 2–5 are elucidated by 2‐D COSY 11B–11B NMR spectra; the structure of 2 is also elucidated by an X‐ray structure analysis.