Solvents, acceptor properties conductivity

The low proton affinities of the solvent molecules allows the development of basic properties for a number of proton acceptors. i, 42 Carbon-halogen compounds, in which the carbon-halogen bond is easily broken with the formation of a stable carbonium ion, act as bases, 43 to give ionized solutions of high conductivities ... 

Liquid antimony bromide has relatively low intrinsic electric conductivity which is of the order of 1 x 10 Q cm. As follows from equation [9.2.20], the solutions of such ionic bromides as (CH3)4NBr, NH4Br, KBr, TlBr should show basic properties. This is really so, and three former bases were found to dissociate completely up to concentrations of the order of 10 mol kg. On the contrary, covalent bromides such as AlBrj, certain Lewis acids of antimony Sb(CH3C6H4S03)3 and adducts of SbCl3 of SbX2AlCl4, SbX2FeCl4 compositions are bromide ion acceptors, therefore, they are referred to as acids, since their addition leads to increase of SbX2 concentration in the liquid antimony halides as compared with that in the pure solvent. 

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