Rhodium(II) acetate dimer
CAS 15956-28-2
Rh₂(OAc)₄ is the defining catalyst of dirhodium carbene chemistry — the paddlewheel complex behind cyclopropanation, C–H insertion and ylide reactions of diazo compounds practiced across medicinal chemistry and total synthesis.
Typical specification
| Molecular formula | Rh₂(CH₃COO)₄ |
|---|---|
| Molecular weight | 441.99 |
| Assay | ≥ 99% |
| Rhodium content | ≥ 46.3% |
| Appearance | Emerald-green powder |
| Solubility | Soluble in polar organics, hot water |
| HS code (export) | 2843900099 |
Lot-specific COA issued with every shipment. SDS and ICP elemental impurity data available on request.
Where Rh₂(OAc)₄ is used
Carbene transfer catalysis
The benchmark catalyst for decomposing diazo esters into metallocarbenes for cyclopropanation, X–H insertion and ylide chemistry — reactions with no practical non-rhodium equivalent at scale.
Gateway to chiral dirhodium catalysts
The synthetic parent of Rh₂(esp)₂, Rh₂(S-DOSP)₄ and other designer paddlewheels; users developing asymmetric routes start validation work from the acetate.
Storage and shipping
Storage. Store sealed, cool and dry; air-stable.
Shipping. Ships by commercial courier with SDS; insured valuables logistics for kilogram-value lots.
Packaging. 250 mg · 1 g · 5 g · 25 g
Synonyms
- Rhodium acetate dimer
- Dirhodium tetraacetate
- Rh2(OAc)4
- Rhodium(II) acetate
Frequently asked questions
How is pricing structured?
Quotes reference the day's metal fixing on assayed contained metal plus a stated conversion charge, and can be locked at order confirmation for recurring volumes.
Why is dirhodium chemistry expensive and is it recoverable?
Rhodium is the priciest PGM and carbene reactions run at low loading precisely for that reason. Reaction residues and scavenger cartridges retain most of the metal — return them for assay and credit.
What documentation is included?
Every lot ships with a certificate of analysis stating assayed metal content, plus an English SDS. ICP trace-metal panels are available on request.