MEMBr complex

The dependence on the temperature of the specific resistance (Q/cm) of the pure MEPBr and MEMBr complexes, and a 1 1 mixture there of, as obtained in Ref. [73], is listed in Table 4. It is remarkable that within the complex phases consisting of Br2 and either pure MEP or MEM the change of specific resistance at the liquid —> solid phase transition amounts to about one order of magnitude, where as the value is only doubled in the 1 1 mixture. The table also indicates that MEMBr complexes possess higher melting temperatures. 

Niepraschk [50] found 23.4 kJ mol 1 for pure MEMBr complex and 16.5 kJ mol 1 for pure MEPBr complexes at 3 mol Br2/mol complexing agent. These values increase slightly with decreasing concentration of Br2. A value of EA of 11.5 kJ mol 1 for a complex phase containing MEP MEM in the ratio 3 1 at comparable contents of Br2 was reported by Hauser [72],... 

Eustace [75] reported a dynamic viscosity of 25 cP a pure MEMBr complex phase at 23 °C. (The specific weight was 2.3 g cm-3). 

Niepraschk [50] found 23.4 kJ mol for pure MEMBr complex and 16.5 kJ mol for pure MEPBr complexes at 3 mol Br2/mol complexing agent. These values increase slightly with decreasing concen-... 

Bt2 and either pure MEP or MEM the change of specific resistance at the hquid soHd phase transition amounts to about 1 order of magnitude, whereas the value is only doubled in the 1 1 mixture. The table also indicates that MEMBr complexes possess higher melting temperatures. 

Figure 2. Vapor pressures of bromine/quaternary ammonium salt complexes elemental Br2, Me4N+ Br, MEMBr, Oct,MeN Cl. From Ref. [59J.

Table 4. Specific resistance and slates of aggregation of pure MEMBr and MEPBr complexes and a 1 1 mixture (taken from Ref. 173])...

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