Correlating structure with thermal properties for a series of 1-alkyl-4-methyl-1,2,4-triazolium ionic liquids.

Thermal properties (T(m) and T(d)) are reported for a series of 1-alkyl-4-methyl-1,2,4-triazolium ionic liquids where the alkyl chain length R and anion [X(-)] were varied. The highest melting transitions were observed when a longer alkyl chain or smaller anion was employed. Thermal stability was the greatest when anions with weak hydrogen bonding capability were used. Correlations were also made between (1)H NMR chemical shift values in acetone-d6 and the hydrogen bonding capability of the anion.