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Article Dans Une Revue Green Chemistry Année : 2021

Measurement of the hydrogen bond acceptance of ionic liquids and green solvents by the 19 F solvatomagnetic comparison method

Résumé

The 19 F solvatomagnetic comparison method yields a more reliable scale (β1) of solvent hydrogen-bond acceptance than the solvatochromic comparison method. For [C4mim] based ionic liquids, the β1 order MeCO2 − (1.30) > Cl − (0.79) > NO3 − (0.67) > SCN − (0.64) > I − (0.44) > BF4 − (0.36) > PF6 − (0.27) is significantly correlated to the intrinsic hydrogen-bonding-, and even proton-, basicities of anions. For solvents of green interest, the β1 value of water is now settled down to 0.37, the newly determined value of limonene is 0.15, while those of α-pinene (0.14), glycerol (0.36), Cyrene TM (0.40), 2methyltetrahydrofuran (0.66), ethyl lactate (0.58), and γ-valerolactone (0.52) are found chemically more relevant than the solvatochromic ones.
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Dates et versions

hal-03353828 , version 1 (28-09-2021)

Identifiants

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Christian Laurence, Sergui Mansour, Daniela Vuluga, Julien Legros. Measurement of the hydrogen bond acceptance of ionic liquids and green solvents by the 19 F solvatomagnetic comparison method. Green Chemistry, 2021, 23 (4), pp.1816-1822. ⟨10.1039/D0GC04104A⟩. ⟨hal-03353828⟩
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