Kinetic Studies on Complexation Reactions of Lithium Ion with Cryptand C211 in Ionic Liquids by Using ^7Li NMR
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Kinetic studies on complexation reactions of Li<SUP>I</SUP> with cryptand C211 in <I>N</I>,<I>N</I>-diethyl-<I>N</I>-methyl-<I>N</I>-(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide (DEMETFSI) and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMITFSI) have been carried out using <SUP>7</SUP>Li NMR. It was found that the reaction rates in both solutions depend on concentrations of free Li<SUP>I</SUP> and that their kinetic parameters are almost same. From these results, it is proposed that the Li<SUP>I</SUP> complexation reactions in DEMETFSI and EMITFSI solutions proceed though bimolecular mechanism.
- Chemistry Letters
Chemistry Letters 37(5), 552-553, 2008-05-05
The Chemical Society of Japan