Solid-state structure of bromine azide

Automated Crystal Structure Determination Has its Pitfalls: Correction to the Crystal Structures of Iodine Azide

Previously published crystal structure determinations of two modifications of iodine azide (IN3 ) are corrected. In the original determinations, the very weak X-ray reflections with odd k Miller indices had been discarded, resulting in too small unit cells and models with misordered, partly occupied atomic positions. Using the original diffraction data, refinements with the correct unit cells yield structures of polymeric (-I-N3 -)n chains that are interlocked to layers. A skilled look at the primary X-ray data is always recommended to overcome the lack of crystallographic expertise of computers at automated structure determinations.

Safe generation and use of bromine azide under continuous flow conditions--selective 1,2-bromoazidation of olefins

Bromine azide (BrN3), a useful but extremely toxic and explosive reagent for the preparation of vicinal 1,2-bromine azide compounds, was safely generated and reacted in situ with alkenes in a continuous flow photoreactor. BrN3 was generated by a novel procedure from NaBr and NaN3 in water, and efficiently extracted into an organic phase containing the alkene thus avoiding decomposition. The resulting addition products have been used for the preparation of several useful building blocks.

Bonding situation in Be[N(SiMe3)2]2 – an experimental and computational study

The solid state structure of Be[N(SiMe₃)₂]₂ (1) was determined by in situ crystallisation and the bonding situation investigated by quantum chemical calculations. The Be–N bond is predominantly ionic but also shows some π-bonding character.

Conformational composition, molecular structure and decomposition of difluorophosphoryl azide in the gas phase

Difluorophosphoryl azide F₂P(O)N₃ has one dominating conformer in the gas phase at ambient temperature. It decomposes upon flash vacuum pyrolysis to the hitherto unknown nitrene F₂P(O)N.