SIMes
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| Names | |
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IUPAC name
1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene
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| Other names
IMesH2, H2IMes
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| Identifiers | |
| ChemSpider | |
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PubChem CID
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| Properties | |
| C21H26N2 | |
| Molar mass | 306.45 g·mol−1 |
| Melting point | 79 to 85 °C (174 to 185 °F; 352 to 358 K) |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
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. It is prepared by alkylation of trimethylaniline by dibromoethane followed by ring closure and dehydrohalogenation.
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