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 1H NMR chemical shift ...