14523-22-9
Tetracarbonyldi-micron-chlorodirhodium(I)
CAS: 14523-22-9
Molecular Formula: 4CO.Cl2Rh2
14523-22-9 - Names and Identifiers
14523-22-9 - Physico-chemical Properties
| Molecular Formula | 4CO.Cl2Rh2 |
| Molar Mass | 388.77 |
| Melting Point | 120-125°C (dec.)(lit.) |
| Water Solubility | soluble in most organic solvents; insoluble aliphatic hydrocarbons [MER06] |
| Solubility | It is soluble in organic or non-aqueous solvent. |
| Appearance | Crystallization |
| Color | red |
| Exposure Limit | ACGIH: TWA 1 mg/m3NIOSH: IDLH 100 mg/m3; TWA 0.1 mg/m3 |
| Merck | 14,8187 |
| Storage Condition | 2-8°C |
| Sensitive | Air & Moisture Sensitive |
| MDL | MFCD00135610 |
14523-22-9 - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R36/38 - Irritating to eyes and skin. R25 - Toxic if swallowed |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S37/39 - Wear suitable gloves and eye/face protection S28A - S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S15 - Keep away from heat. |
| UN IDs | UN3466 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 10-21-23 |
| TSCA | No |
| HS Code | 28439000 |
| Hazard Class | 6.1 |
| Packing Group | III |
14523-22-9 - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| Use | Rhodium tetracarbonyl dichloride is a metal catalyst with the molecular formula [Rh(CO)2]Cl2, which can be prepared by the reaction of rhodium chloride and carbon monoxide gas. There are reports that it can be used to prepare acetylacetone triphenylphosphorous carbonylrhodium. As homogeneous catalysts of noble metals, rhodium compounds have been widely used in important chemical processes such as hydroformylation, hydrogenation, and carbonyl synthesis. Most of the carbonyl synthesis alcohols (mainly butyl/octanol) units of large petrochemical companies at home and abroad use a low-pressure propylene hydroformylation process. The core of this process is a rhodium catalyst, and as a commercial product that is easy to transport and store, it is usually Rhodium Parker-acetylacetonate triphenylphosphine carbonyl rhodium is used as a catalyst for the chemical process of carbonyl synthesis of alcohols. |
| preparation | synthesis of rhodium tetracarbonyl dichloride, RhCl3 · 3H2O CO → Rh2Cl2(CO)4 COCl2 grinding an appropriate amount of rhodium chloride trihydrate crystals into 30-100 order fine powder with a mortar, and evenly spreading it on a sand core in a glass reaction tube. the length-diameter ratio of the glass reaction tube generally needs to be ≥ 15, for example, the length is 30cm and the diameter is 2cm; connect a carbon monoxide gas source to the glass reaction tube, first ventilate for 5-10 minutes at room temperature to drive away the residual air in the glass reaction tube, and then immerse the lower end of the glass reaction tube in a heated oil bath, And make the liquid level of the oil bath outside the glass reaction tube higher than the reaction layer on the sand core; continue to introduce carbon monoxide gas, and the rhodium chloride trihydrate crystalline powder gradually sublimates, and gradually orange-red needle-like crystals are condensed on the inner wall of the glass reaction tube (the grinding plug in the upper port of the glass reaction tube can be opened at intervals (10-20 minutes) as needed, and the water droplets on the inner wall of the glass reaction tube are sucked dry with water absorbent wool); After the reaction is over, there should be almost no reactant residue on the sand core. At this time, the carbon monoxide gas source can be closed and the glass reaction tube can be taken out of the oil bath to open the grinding plug, use a scraper to scrape the orange-red needle-like crystals on the inner wall of the glass reaction tube and collect them to obtain tetracarbonyl dichlorodium with a melting point of 124°C. |
Last Update：2024-04-10 22:29:15
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