Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5412032 | Journal of Molecular Liquids | 2013 | 9 Pages |
Abstract
Protonation sites of a chelating mono-protic ionic liquid (PIL) comprising N-hexylethylenediaminium (= HHexen+) depending on the counter anion were studied by 15N and 13C NMR spectroscopy and DFT calculation. In the case of the bis(trifluoromethanesulfonyl) amide (= TFSAâ) PIL, the protonation occurred almost at the secondary amine, whereas the protonation occurred preferentially at the primary amine in the trifluoroacetate (= TFAâ) PIL. The formation of a chelating copper(II) complex with the cationic unit of the PIL despite the electrostatic repulsion was revealed using the paramagnetic broadenings of the 13C NMR spectra of the PILs.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Mayu Watanabe, Shinobu Takemura, Sayaka Kawakami, Emi Syouno, Hiromichi Kurosu, Masafumi Harada, Masayasu Iida,