Bis(2,4,6-trimethylphenyl)phosphine
Bis(2,4,6-trimethylphenyl)phosphine (CAS 1732-66-7), also known as dimesitylphosphine, is an organophosphorus compound with the molecular formula C18H23P and a molecular weight of 270.35 g/mol. A bulky, electron-rich secondary diarylphosphine bearing two mesityl groups and a reactive P-H bond, it serves mainly as a ligand and as a precursor for synthesising tertiary phosphine ligands used in transition-metal catalysis and chemical synthesis. Tech Serve Solutions supplies it as a research-grade reagent at 97% assay.
- IUPAC
- Dimesitylphosphine
- Synonyms
- Bis(2,4,6-trimethylphenyl)phosphineDimesitylphosphineDimesityl phosphineBis(mesityl)phosphineCAS 1732-66-7C18H23P
Phosphine ligand in transition-metal catalysis
The sterically demanding, electron-rich mesityl substituents make this phosphine useful as a ligand for transition-metal complexes. Such bulky, basic phosphines are widely employed to tune the activity and selectivity of homogeneous catalysts.
Precursor to tertiary phosphine ligands
The reactive P-H bond of this secondary phosphine allows further functionalisation to build more elaborate tertiary phosphines. It is therefore a convenient phosphorus building block for ligand and ligand-library synthesis.
Organophosphorus and chemical synthesis
As a defined diarylphosphine, it is used as a reagent and intermediate in organophosphorus chemistry. It supports research-scale preparation of phosphorus-containing molecules and coordination compounds.
Research and laboratory reagent
Supplied at 97% assay, it is suited to laboratory and method-development work in catalysis and inorganic chemistry. It is offered for research and manufacturing use, not for clinical or food applications.
| Molecular weight | 270.35 |
|---|---|
| Empirical formula | C18H23P |
| Assay | 97% |
| Melting point | 95-100 °C |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 2 |
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 Bis(2,4,6-trimethylphenyl)phosphine used for?
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It is used chiefly as a bulky, electron-rich secondary phosphine ligand and as a precursor for synthesising tertiary phosphine ligands. These find application in transition-metal catalysis and in broader organophosphorus and inorganic chemical synthesis.
What is the CAS number and molecular formula of Bis(2,4,6-trimethylphenyl)phosphine?
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Its CAS number is 1732-66-7 and its molecular formula is C18H23P, giving a molecular weight of 270.35 g/mol. It is also commonly known as dimesitylphosphine and reported with a melting point of 95-100 degrees C.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Bis(2,4,6-trimethylphenyl)phosphine as a research-grade reagent at 97% assay. We do not represent it as USP, BP or EP pharmacopoeia grade. A Certificate of Analysis can be provided with each consignment.
What are the safety and handling requirements?
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Handle with appropriate personal protective equipment, including eye shields, gloves and an N95 (US) or P1 (EN143) respirator filter. It carries a German Water Hazard Class (WGK) of 2, so contamination of water must be prevented. As a P-H secondary phosphine it can be air- and moisture-sensitive; always consult the current Safety Data Sheet before use.
How is Bis(2,4,6-trimethylphenyl)phosphine packed, shipped and exported?
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It is packed in tightly sealed, appropriately labelled containers sized to your requirement and prepared for safe domestic and international transport. As a global exporter, Tech Serve Solutions arranges compliant documentation and handles shipping in line with applicable dangerous-goods and destination-country regulations.
How do I request a sample or quote?
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Contact Tech Serve Solutions with your required quantity, purity and destination, and our team will respond with availability, lead time and a formal quotation. Sample requests for evaluation can be accommodated on enquiry.
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