RTIL bonds and viscosity



I am studying the chemical and physical properties of room-temperature ionic liquids (RTIL) like N-butylimidazolium tetrafluoroborate (bmim BF4).

Can anyone point me at computational studies of these compounds? I'm particularly interested in the following properties:
bond energies
proton affinities
solvent viscosity

Also, is there a good way to predict viscosity using molecular models? Any leading references would be most appreciated.

Thanks,

-Alan

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Alan Shusterman
Department of Chemistry
Reed College
3203 S.E. Woodstock Blvd.
Portland, OR 97202
503-771-1112, ext. 7699