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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Imidazole-derived carbenes and their elusive tetraazafulvalene dimers

Jolly, Phillip I. and Zhou, Shengze and Thomson, Douglas W. and Garnier, Jean and Parkinson, John A. and Tuttle, Tell and Murphy, John A. (2012) Imidazole-derived carbenes and their elusive tetraazafulvalene dimers. Chemical Science, 3 (5). pp. 1675-1679. ISSN 2041-6520

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Abstract

Previous efforts to prepare tetraazafulvalenes derived from imidazolium salt precursors have met with little success (one anomalously favourable example is known), and this is in line with the predicted reactivity of these compounds. However, we now report the preparation of a series of these tetraazafulvalenes formed either by deprotonation of 1,3-dialkylimidazolium salts or by Birch reduction of biimidazolium salts. The tetraazafulvalenes are highly reactive; for example, they act as Super-Electron-Donors towards iodoarenes. The two most reactive examples are formed more efficiently by Birch reduction than by the deprotonation route. Nevertheless, even in cases where the deprotonation approach affords a low stationary concentration, the mixture of precursor salt and base still produces the same powerful reductive chemistry that is the hallmark of tetraazafulvalene electron donors.