title: Designing ionic liquids with boron cluster anions: alkylpyridinium and imidazolium [nido-C(2)B(9)H(11)] and [closo-CB(11)H(12)] carborane salts.
abstract: A range of new alkylpyridinium and imidazolium carborane salts with [nido-C(2)B(9)H(12)](-), [closo-CB(11)H(12)](-), and [RC(2)B(11)H(11)](-) (R = methyl or butyl) anions have been prepared and characterized by physical and thermal methods, including the solid state structures of five of the salts determined by single crystal X-ray diffraction. The tendency of the salts to form low-melting ionic liquids has been assessed; all the salts studied with [nido-C(2)B(9)H(12)](-) anions melted below 100 degrees C and, significantly, have melting points that are 25-85 degrees C lower than those of the corresponding [closo-CB(11)H(12)](-) analogs, demonstrating that a wider range of boron-rich ionic liquid materials can be readily accessed.
authors.affiliation: Department of Chemistry, Ithaca College, Ithaca, NY 14850, USA.
authors.forename: John
authors.initials: J
authors.lastname: Dymon
authors.forename: Ryan
authors.initials: R
authors.lastname: Wibby
authors.forename: Jesse
authors.initials: J
authors.lastname: Kleingardner
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Tanski
authors.forename: Ilia A
authors.initials: IA
authors.lastname: Guzei
authors.forename: John D
authors.initials: JD
authors.lastname: Holbrey
authors.forename: Anna S
authors.initials: AS
authors.lastname: Larsen