Dialkyl-Imidazole-2-Ylidenes

Submitted by THOMAS SCHAUB and UDO RADIUS1 Checked by ALEXANDRIA BRUCKS,1 MARY P. CHOULES,1 MATTHEW T. OLSEN, and THOMAS B. RAUCHFUSS  

Institut fiir Anorganische Chemie der Universitat Wurzburg, 97074 Wurzburg, Germany. Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801. 

Inorganic Syntheses, Volume 35, edited by Thomas B. Rauchfuss Copyright 2010 John Wiley Sons, Inc. 

In the second step, these imidazolium salts are deprotonated with NaH either at room temperature in THF using KO Bu as a phase-transfer catalyst ( Pr2Im, Pr2Im) or at —78°C in liquid NH3 (Me2Im, Me Prlm) to yield the stable NHCs. 

3-DI-ra-PROPYL-IMIDAZOLIUM CHLORIDE ( Pr2ImHCl) and 1,3-DIISOPROPYL-IMIDAZOLIUM CHLORIDE ( Pr2ImHCl) 

---

Imidazolium ligands, in Rh complexes, 7, 126 Imidazolium salts iridium binding, 7, 349 in silver(I) carbene synthesis, 2, 206 Imidazol-2-ylidene carbenes, with tungsten carbonyls, 5, 678 (Imidazol-2-ylidene)gold(I) complexes, preparation, 2, 289 Imidazopyridine, in trinuclear Ru and Os clusters, 6, 727 Imidazo[l,2-a]-pyridines, iodo-substituted, in Grignard reagent preparation, 9, 37—38 Imido alkyl complexes, with tantalum, 5, 118—120 Imido-amido half-sandwich compounds, with tantalum, 5,183 /13-Imido clusters, with trinuclear Ru clusters, 6, 733 Imido complexes with bis-Gp Ti, 4, 579 with monoalkyl Ti(IV), 4, 336 with mono-Gp Ti(IV), 4, 419 with Ru half-sandwiches, 6, 519—520 with tantalum, 5, 110 with titanium(IV) dialkyls, 4, 352 with titanocenes, 4, 566 with tungsten... 

---