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Issue 61, 2018, Issue in Progress
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Anion influences on reactivity and NMR spectroscopic features of NHC precursors

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Abstract

A series of 16 benzimidazolium salts of the type iPr2-bimyH+X with various anions X were synthesized and characterized by various spectroscopic and spectrometric methods. Significant anion and solvent effects on the chemical shifts of the C2–H protons were found, which allows for a ranking of the anions in terms of their hydrogen-bond acceptor properties. Stronger acceptors could increase the acidity of their respective salts leading to a faster H/D exchange. Similar but less pronounced anion influences were detected for the 13CC2 NMR resonances, while 1JC2–H coupling constants appear to be anion and solvent independent.

Graphical abstract: Anion influences on reactivity and NMR spectroscopic features of NHC precursors

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Publication details

The article was received on 09 Jul 2018, accepted on 06 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8RA05839C
RSC Adv., 2018,8, 34960-34966
  • Open access: Creative Commons BY-NC license
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    Anion influences on reactivity and NMR spectroscopic features of NHC precursors

    H. V. Huynh, T. T. Lam and H. T. T. Luong, RSC Adv., 2018, 8, 34960
    DOI: 10.1039/C8RA05839C

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