C-13 NMR RELAXATION AND DUAL-SPIN PROBE STUDIES OF MOLTEN-SALTS CONTAINING ETHYLALUMINUM DICHLORIDE

The microdynamics of binary and ternary room-temperature molten salts containing ethylaluminum dichloride (EtAlCl(2)) are examined by C-13 NMR relaxation methods as a function of melt composition and temperature. The EtAlCl(2) melts include 1-ethyl-3-methylimidazolium chloride (MEICl) and AlCl3. Dual spin probe (DSP) results indicate that interactions exist between the MEI cation and both AlCl4- and the EtAlCl(2) dimer. Liquid-state Al-27 quadrupolar coupling constants of complexes between MEI(+) and either AlCl4- (1.11-1.20 MHz) or the EtAlCl(2) dimer (31-43 MHz) are obtained from DSP analyses.