1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydroimidazolium tetrafluoroborate
1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydroimidazolium tetrafluoroborate (CAS 282109-83-5) is a stable N-heterocyclic carbene (NHC) precursor. With a molecular weight of 478.42 g/mol, this compound is primarily utilised as a ligand in organometallic chemistry and catalysis. Its robust structure makes it valuable in various synthetic transformations, particularly in cross-coupling reactions. Available from Tech Serve Solutions with an assay of 95%, it is a key reagent for advanced chemical research and development.
- IUPAC
- 4,5-Dihydro-1,3-bis(2,6-diisopropylphenyl)imidazolium tetrafluoroborate,N,N′-Bis(2,6-diisopropylphenyl)dihydroimidazolium tetrafluoroborate,SIPr-HBF4
- Synonyms
- 5-dihydroimidazolium tetrafluoroborateC27H39BF4N24,5-Dihydro-1,3-bis(2,6-diisopropylphenyl)imidazolium tetrafluoroborateN,N′-Bis(2,6-diisopropylphenyl)dihydroimidazolium tetrafluoroborateSIPr-HBF4

Organometallic Catalysis
This compound serves as a precursor to N-heterocyclic carbenes, which are highly effective ligands for transition metal catalysts. These catalytic systems are employed in a wide range of organic transformations, including cross-coupling reactions like Suzuki-Miyaura and Heck couplings.
Chemical Synthesis
As a versatile building block, it facilitates the synthesis of complex organic molecules. Its application extends to areas requiring precise control over reaction pathways and product selectivity, making it a valuable tool for synthetic chemists.
Research and Development
Utilised in academic and industrial research laboratories for exploring new catalytic methods and developing novel synthetic routes. Its predictable behaviour and stability under various conditions make it a reliable reagent for experimental investigations.
| Molecular weight | 478.42 |
|---|---|
| Empirical formula | C27H39BF4N2 |
| Assay | 95% |
| Melting point | >300 |


Hazard statements
- H314Causes severe skin burns and eye damage
- H332Harmful if inhaled
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 1759 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 20-34 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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(2,6-diisopropylphenyl)-4,5-dihydroimidazolium tetrafluoroborate used for?
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This compound is used as a precursor for N-heterocyclic carbene (NHC) ligands in organometallic catalysis and for general chemical synthesis.
What are the CAS number and formula for this chemical?
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The CAS number is 282109-83-5 and the empirical formula (Hill notation) is C27H39BF4N2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with a minimum assay of 95%. This is a technical/research grade material and is not represented as USP, BP, EP, or pharmacopoeia grade.
How should 1,3-Bis(2,6-diisopropylphenyl)-4,5-dihydroimidazolium tetrafluoroborate be handled?
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This compound is classified as Danger. It causes severe skin burns and eye damage (H314) and may cause respiratory irritation (H332). Appropriate personal protective equipment, including eyeshields, face shields, gloves, and respiratory protection (type N100 or P3), must be worn. Handle in a well-ventilated area.
How is this chemical packed and shipped?
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This chemical is shipped as a hazardous material (UN 1759, Class 8, Packing Group II). Packaging adheres to international shipping regulations for corrosive solids.
How can I request a sample or a quote?
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To request a sample or a quote, please contact our sales department via the website or direct email, providing the product name and CAS number.
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