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Issue 31, 2010
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Ionic liquids and solids with paramagnetic anions

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Four paramagnetic ionic compounds have been prepared and their magnetic, structural and thermal properties have been investigated. The four compounds are methylbutylpyrrolidinium tetrachloroferrate(III) ([Pyrr14]+/[FeCl4]), methyltributylammonium tetrachloroferrate(III) ([N1444]+/[FeCl4]), butylmethylimidazolium tetrachloroferrate(III) ([bmim]+/[FeCl4]) and tetrabutylammonium bromotrichloroferrate(III) ([N4444]+/[FeBrCl3]). Temperature-dependent studies of their magnetic behaviors show that all four compounds are paramagnetic at ambient temperatures. Glass transitions are observed for only two of the four compounds, [Pyrr14]+/[FeCl4] and [bmim]+/[FeCl4]. Crystal structures for [Pyrr14]+/[FeCl4] and [N1444]+/[FeCl4] are compared with the previously reported [N4444]+/[FeBrCl3].

Graphical abstract: Ionic liquids and solids with paramagnetic anions

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The article was received on 02 Oct 2009, accepted on 23 Apr 2010 and first published on 18 Jun 2010

Article type: Paper
DOI: 10.1039/B920652N
Citation: Phys. Chem. Chem. Phys., 2010,12, 8919-8925
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    Ionic liquids and solids with paramagnetic anions

    B. M. Krieger, H. Y. Lee, T. J. Emge, J. F. Wishart and E. W. Castner, Jr., Phys. Chem. Chem. Phys., 2010, 12, 8919
    DOI: 10.1039/B920652N

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