Imidazole derivatives. Part 44. Nucleophilic aromatic substitution at 2-fluoromidazolium ions: Synthesis and crystal structure of a dicationic 2,2'-biimidazolyl derivative.
The dicationic 2,2-biimidazolyl deriv. I was obtained from the imidazolium salt and carbene in good yield. The presence of the imidazolium carbene and its unstable dimer were detected by NMR in the redn. product of I with K. The crystal structure of I.H2O [orthorhombic, P212121, a 11.9152(2), b 15.2251(3), c 16.0607.ANG., V 2913.57(9) .ANG.3,Z 4] is reported.
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