CHEM 3820 / Experiment 2: Ionic Liquids - Part 1
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4 Terms
What are ionic liquids?
Salts that are liquid near room temp.
Why are ionic liquids in the liquid state at low temps?
> Bulky ions prevent tight packing.
> Doesn’t take much heat to go from solid → liquid.
> Low melting point.
What special ions need to be used in order to make these ionic liquids? Why do we need them?
> We need bulky ions w/ delocalized charge.
> Small metal cations = small, compact, w/ high charge density → strong attraction w/ anions → crystal lattice → solid at RT.
> Bulky metal cations = big w/ charge spread out for less packing + delocalized charge for weaker pull (b/c no single point is highly charged) → ions don’t lock into crystal lattice → liquid at RT.
Why do you need to dry the glassware for 110ºC for 2h before the rxn begins?
Products ≠ moisture- / oxygen-sensitive but can interfere w/ ability of ionic liquids to be used in application.
Note 
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