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Acylation, Heterocycles, Imidazoles 2,3-Dihydro-l,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (2, Im) reacts with PhC(O)X to give the imidazolium salts [PhC(O)Im]F (3) and [PhC(O)Im]Cl (5). From 3 and the corre­ sponding fluoro compounds, the salts [PhC(O)Im][BF 4 ] (4a), [PhC(O)Im][Ph 3 SiF 2 ] (4b) and [PhC(O)Im] [Ph 3 SnF 2 ] (4c) are obtained. 2 reacts with oxalylic chloride under CO elimination to give the salt [Im 2 CO]Cl 2  (7). The X-ray data of 4c and 7 · 4 H 2 0 · 2 HCl ([Im 2 CO][Cl 4 H 10 O 4 ]) are reported.

zeitschrift für naturforschung b

Zur Acylierung von 2,3-Dihydro-l,3-diisopropyl-4,5- dimethylimidazol-2-yliden [1] / Acylation o f 2,3-Dihydro-l,3-diisopropyl-4,5-dimethylimidazol-2-ylidene [1]