Description

1,3-Dimesityl-4,5-Dihydro-1H-Imidazol-3-Ium CAS NO 245679-17-8 is a highly specialized, sterically hindered N-heterocyclic carbene (NHC) precursor salt. This compound is valued for its role as a stable and versatile ligand source in advanced organometallic catalysis and materials science research. It is primarily sought by R&D chemists and process engineers in the pharmaceutical, fine chemical, and polymer industries for developing novel synthetic methodologies and catalytic systems.

Application

• Precursor for N-Heterocyclic Carbene (NHC) Ligands: Serves as a stable and air-tolerant source of sterically demanding NHC ligands for transition metal catalysis.
• Homogeneous Catalysis: Used in the synthesis of catalysts for cross-coupling reactions (e.g., Suzuki, Heck), olefin metathesis, and hydrogenation processes.
• Pharmaceutical Intermediate Synthesis: Employed in the research and development of complex active pharmaceutical ingredients (APIs) requiring precise stereochemical control.
• Polymerization Catalyst Component: Acts as a ligand in catalyst systems for the controlled polymerization of olefins and other monomers.
• Materials Science Research: Utilized in the development of novel organometallic frameworks, sensors, and functional materials.
• Academic & Industrial R&D: A key reagent for exploring new reaction pathways and catalytic mechanisms in synthetic chemistry laboratories.

Basic Information

Item	Details
Product Name	1,3-Dimesityl-4,5-Dihydro-1H-Imidazol-3-Ium
CAS No.	245679-17-8
Molecular Formula	C27H31N2+
Molecular Weight	383.55 g/mol
Synonyms	1,3-Bis(2,4,6-trimethylphenyl)-4,5-dihydro-1H-imidazol-3-ium; 1,3-Dimesityl-4,5-dihydroimidazolium; 1,3-Dimesitylimidazolinium; SIMes·HX (protonated form); NHC precursor salt; 1,3-Bis(2,4,6-trimethylphenyl)imidazolinium salt
EINECS	Contact for details

Quality Control

Every batch of our 1,3-Dimesityl-4,5-Dihydro-1H-Imidazol-3-Ium is produced and tested under strict quality management protocols to ensure high purity, consistency, and reliability for critical research and development applications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality systems are designed to support cGMP and ISO-guided environments where traceability and documentation are paramount.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.