Silaimidazolium and silaimidazolidinium ions

Dalton Transactions : an International Journal of Inorganic Chemistry
Annemarie SchäferThomas Müller

Abstract

2-Silaimidazolium ions and 2-silaimidazolidinium ions were synthesized by Lewis acid-base adduct formation between N-heterocyclic silylenes and silyl arenium ions. They were isolated in high yields as their [B(C(6)F(5))(4)](-) salts. These salts are stable at room temperature and were characterized by NMR spectroscopy supported by the results of density functional computations of molecular structures and NMR chemical shifts. NICS calculations suggest for the imidazolium ions only a modest degree of aromaticity. Despite the bulkiness of the used substituents R(1) and R(2), silylium ions and behave as classical Lewis pairs and show no unexpected reactivity.

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Citations

Aug 22, 2015·Organometallics·Lena AlbersThomas Müller
Sep 16, 2011·Chemistry : a European Journal·Annemarie SchäferThomas Müller
Jun 19, 2019·Chemical Communications : Chem Comm·Nina KramerLutz Greb
Sep 22, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Benedikt J GuddorfFelicitas Lips
Apr 17, 2021·Chemical Reviews·Hendrik F T KlareMartin Oestreich
Aug 16, 2011·Journal of the American Chemical Society·Annemarie SchäferThomas Müller

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