SIMes explained

SIMes (or H2Imes) is an N-heterocyclic carbene. It is a white solid that dissolves in organic solvents. The compound is used as a ligand in organometallic chemistry. It is structurally related to the more common ligand IMes but with a saturated backbone (the S of SIMes indicates a saturated backbone). It is slightly more flexible and is a component in Grubbs II.[1] It is prepared by alkylation of trimethylaniline by dibromoethane followed by ring closure and dehydrohalogenation.[2]

References

  1. Book: Nolan, Steven P.. N-Heterocyclic Carbenes in Synthesis. Wiley-VCH. 2006. 978-3-527-60940-6.
  2. Web site: Synthesis of 1,3–bis(2,4,6–trimethylphenyl)–imidazolinium salts : SIMes.HCl, SIMes.HBr, SIMes.HBF4 and SIMes.HPF6. : Protocol Exchange. www.nature.com. 10 October 2012 . en. 2017-09-25.