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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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Supplementary files

Article information


Submitted
09 Jul 2018
Accepted
06 Oct 2018
First published
12 Oct 2018

This article is Open Access

RSC Adv., 2018,8, 34960-34966
Article type
Paper

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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