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Optimised synthesis of monoanionic bis(NHC)-pincer ligand precursors and their Li-complexes†
Eva Jürgens,Kai N. Buys,Anna-Theresa Schmidt,Samantha K. Furfari,Marcus L. Cole,Michael Moser,Frank Rominger
New Journal of Chemistry Pub Date : 09/19/2016 00:00:00 , DOI:10.1039/C6NJ01941B
Abstract

Herein we report the optimised synthesis of a versatile bis(imidazole)carbazole framework 4, a precursor to our previously reported C–N–C bis(NHC) pincer ligand, bimca. We have also used 4 as a basis for constructing a library of fully characterised bis(imidazolium) salt pre-ligands which vary the steric and electronic parameters of the subsequently formed NHC moieties. Lithium bis(NHC)carbazolide complexes Li(bimcaR) were generated from their parent bis(imidazolium)carbazole salts, and their behavior in solution and the solid state is discussed.

Graphical abstract: Optimised synthesis of monoanionic bis(NHC)-pincer ligand precursors and their Li-complexes
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