1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene
1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene (CAS: 173035-11-5; C21H26N2) is a stable N-heterocyclic carbene (NHC) compound with a molecular weight of 306.44 g/mol. It is valued for its robust coordination chemistry and serves as a key ligand in various catalytic applications, particularly in organometallic chemistry and organic synthesis. Supplied with an assay of 97%, it is typically stored at "-20°C".
- IUPAC
- 1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene,SIMes
- Synonyms
- 1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene,SIMes,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene,173035-11-5,C21H26N2

Organometallic Catalysis
This compound functions as a strong sigma-donating ligand in transition metal catalysis. It stabilises metal centres and influences the reactivity of catalytic species in cross-coupling reactions and other organic transformations.
NHC Ligand in Synthesis
As a prominent member of the N-heterocyclic carbene family, it is employed in the synthesis of novel organometallic complexes. These complexes find utility in areas requiring precise control over chemical reactions.
Chemical Research
Researchers utilise this reagent in academic and industrial settings for exploring new catalytic pathways and developing advanced synthetic methodologies. Its predictable coordination behaviour makes it a reliable tool.
| Molecular weight | 306.44 |
|---|---|
| Empirical formula | C21H26N2 |
| Assay | 97% |
| Storage temperature | −20°C |
| Melting point | 79-85 °C |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene used for?
+
1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene is primarily used as a ligand in organometallic catalysis and for general chemical synthesis research, particularly involving N-heterocyclic carbene chemistry.
What is the CAS number and molecular formula for this compound?
+
The CAS number is 173035-11-5 and the empirical formula is C21H26N2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies this compound with an assay of 97%. It is not represented as USP, BP, or EP grade.
How should this chemical be handled and stored?
+
This compound has a GHS hazard classification of 3 (WGK Germany). It should be stored at -20°C and handled with appropriate personal protective equipment to avoid exposure.
Is this compound available for export and how is it shipped?
+
Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals. This product can be shipped internationally, adhering to all relevant regulations.
How can I request a sample or obtain a quote?
+
Please contact our sales team via the website or by phone to request a sample or a quotation for 1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene.
▶ Related products

Benzeneruthenium(II) chloride dimer
Ru2(C6H6)2Cl4
Catalysis & Inorganic
Benzoylferrocene
C17H14FeO
Catalysis & Inorganic
Benzyldiphenylphosphine
C6H5CH2P(C6H5)2
Catalysis & Inorganic
Beryllium
Be
Catalysis & Inorganic
Beryllium oxide
BeO
Catalysis & Inorganic![Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer — chemical structure, CAS 12257-42-0; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F12257-42-0.png&w=3840&q=75)
Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer
Catalysis & Inorganic
![Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo — chemical structure, CAS 1228149-03-8; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1228149-03-8.png&w=3840&q=75)
Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo
1-d:1′
Catalysis & Inorganic![Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride (C16H20ClN3Ni) — chemical structure, CAS 1033772-47-2; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1033772-47-2.png&w=3840&q=75)
Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride
C16H20ClN3Ni
Catalysis & Inorganic▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis