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 |
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Authors: | Dymon John Wibby Ryan Kleingardner Jesse Tanski Joseph M Guzei Ilia A Holbrey John D Larsen Anna S |
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Institution: | Department of Chemistry, Ithaca College, Ithaca, NY 14850, USA. |
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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. |
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