Tetracarbonyldi-μ-chlorodirhodium(I)
CAS 14523-22-9
[Rh(CO)₂Cl]₂ is the highest-rhodium-density soluble Rh(I) precursor at ~53% Rh — the volatile chloro-bridged carbonyl dimer used in carbonylation catalysis, rhodium CVD and as an economical entry to Rh(I) complex synthesis.
Typical specification
| Molecular formula | [Rh(CO)₂Cl]₂ |
|---|---|
| Molecular weight | 388.76 |
| Assay | ≥ 98% |
| Rhodium content | ≥ 52.5% |
| Appearance | Red to red-orange crystalline solid |
| Volatility | Sublimes under reduced pressure |
| Solubility | Soluble in hexane, DCM, benzene |
| HS code (export) | 2843900099 |
Lot-specific COA issued with every shipment. SDS and ICP elemental impurity data available on request.
Where [Rh(CO)₂Cl]₂ is used
Carbonylation catalysis
A direct precursor to the rhodium carbonyl iodide species active in methanol carbonylation and related industrial acetyl chemistry, and a catalyst platform for hydroformylation research.
Rhodium CVD and thin films
Its volatility and clean decomposition make it a preferred source for rhodium film deposition on electrodes, mirrors and contact surfaces.
Economical Rh(I) building block
At ~53% rhodium it carries more metal per gram than any phosphine or diene complex, so the chloride bridges can be cleaved with ligands to reach a wide range of Rh(I) species at the lowest metal-accounting overhead.
Storage and shipping
Storage. Store cold (2–8 °C), sealed under inert gas, protected from light. Volatile and sublimable; keep containers tightly closed.
Shipping. Ships in sealed glass under nitrogen; CO-release handling note supplied with SDS.
Packaging. 1 g · 5 g · 25 g · 100 g
Synonyms
- Rhodium carbonyl chloride dimer
- Dirhodium tetracarbonyl dichloride
- [RhCl(CO)2]2
- Rhodium dicarbonyl chloride dimer
Frequently asked questions
What handling precautions apply?
The complex releases carbon monoxide on decomposition and is volatile at ambient temperature — handle in a fume hood, keep containers sealed, and store cold to limit sublimation losses over time.
How is pricing structured?
Rhodium is the most volatile-priced PGM. Every quote states its fixing reference and validity window; we recommend locking the metal leg the day you confirm the order rather than the day you pay.
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.
Do you take back spent material?
Yes — residues, spent catalyst and off-spec lots are assayed on receipt and the recovered rhodium credited against your next order.