Abstract
Cyclopropyl moieties embedded in the long aliphatic side chains of imidazolium-type ionic liquids are shown to be highly effective in lowering the Tm of such materials relative to counterparts bearing linear, saturated side chains. While not as efficient as olefins in bringing about this effect, ILs incorporating side-chain cyclopropanated modules are likely to be more resistant to aerobic degradation than those employing the former.