n-Hexane Bromination Using Barium Fluorobromate Ba(BrF4)2

It was observed that Ba(BrF4)2 demonstrates a high reactivity towards n-hexane. It was found that the heating the reaction mass proceed with intensive self-heating up to 40 °C and release of elemental bromine. The GC-MS analysis showed that the main product of Ba(BrF4)2 interaction with n-hexane is 3-bromohexane. The optimal interaction parameters were found. The heat effect of the reaction was determined by isothermal calorimetric method, it was –1451 kJ/mole. The qualitative composition of solid precipitate was determined by EDXRF and XRD analyses. BaF2 is formed as only solid product of the reaction between Ba(BrF4)2 and n-hexane. It was found that conditions of researched reaction are quite unusual for known free-radical hydrogen substitution processes in case of alkanes. Also we can conclude that Ba(BrF4)2 is much more soft reagent is case of interaction with alkanes in comparison with BrF3 and it can provide more or less selective bromination of alkane unlikely to BrF3.