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Issue 5, 2002
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Ionic liquids based on imidazolium, ammonium and pyrrolidinium salts of the dicyanamide anion

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Abstract

New families of salts, based on quaternary ammonium, 1-methyl-3-alkylimidazolium or N-methyl-N-alkylpyrrolidinium organic cations together with the dicyanamide (dca, N(CN)2) anion are reported. The salts are low melting compounds, all those reported are liquid at room temperature, for example 1-methyl-3-ethylimidazolium dicyanamide (mp −21 °C) and N-methyl-N-ethylpyrrolidinium dicyanamide (mp −10 °C). Some of the salts exhibit multiple crystalline phases below their melting points. Above their melting points they are stable to at least 200 °C. Many of the salts were found to be glass forming when cooled rapidly to −100 °C. The room-temperature liquids exhibit very low viscosities, for example ethylmethylimidazolium dicyanamide: η = 21 cP at ambient temperature (25 °C).

Graphical abstract: Ionic liquids based on imidazolium, ammonium and pyrrolidinium salts of the dicyanamide anion

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Publication details

The article was received on 11 Jun 2002 and first published on 29 Jul 2002


Article type: Paper
DOI: 10.1039/B205641K
Citation: Green Chem., 2002,4, 444-448
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    Ionic liquids based on imidazolium, ammonium and pyrrolidinium salts of the dicyanamide anion

    D. R. MacFarlane, S. A. Forsyth, J. Golding and G. B. Deacon, Green Chem., 2002, 4, 444
    DOI: 10.1039/B205641K

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