Multiple Noncovalent Binding in the Intermediates and Products of the Reaction of <i>N,N</i>-Dimethylformamide with Bromine

Abstract

Reaction of nonionic N,N-dimethylformamide (DMF) with bromine under controllable conditions leads to a number of ionic compounds, mainly to bis(N,N-dimethylformamide)hydrogen dibromobromate. Computations with DFT (ωB97xV/dgdzvp) were made for geometry, thermochemistry and electron configuration of products and supposed intermediates. Two labile particles [bis(N,N-dimethylformamide)hydrogen cation and dibromobromate-anion] form stable highly conductive ionic liquid that can be distilled in vacuo without losses or decomposition. A number of molecular complexes of DMF with bromine and water presumed to be intermediates of this reaction. It is a set of halogen and hydrogen bonding that provide an intramolecular binding in these complexes.