Tetrakis[μ-(acetato-O:O')]dirhodium
Rh2(OAc)4 · RHODIUM ACETATE DIMER · DIRHODIUM(II) TETRAACETATE · dirhodiumtetraacetate · tetrakis(acetato)dirhodium · tetraac · Rh2(CH3CO2)4 · Dimer acid rhodium
![Molekülstruktur von Tetrakis[μ-(acetato-O:O')]dirhodium](/img/chemical/423677.png)
Identifikatoren & physikalische Daten
| CAS No. | 15956-28-2 |
|---|---|
| Summenformel | C8H16O8Rh2 |
| Durchschnittliche Molmasse | 446,02 g/mol |
| SMILES | CC(=O)O.CC(=O)O.CC(=O)O.CC(=O)O.[Rh].[Rh] |
| InChIKey | DRGVLUZIGUIMLB-UHFFFAOYSA-N |
| PubChem CID | 423677 |
| Lokaler Name | Tetrakis[μ-(acetato-O:O')]dirhodium |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 149 |
|---|---|
| H-Brücken-Donoren | 4 |
| H-Brücken-Akzeptoren | 8 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 18 |
| Formalladung | 0 |
| Komplexität | 181 |
| Schmelzpunkt | 205 °C |
| Lagerbedingungen | Inert atmosphere,Room Temperature |
| Löslichkeit | Methanol + Water (Slightly)Soluble in aqueous solution like water. Slightly soluble in ethanol |
| Aggregatzustand | powder |
| Farbe | Green to dark green |
| Stabilität | Hygroscopic |
| InChI | InChI=1S/4C2H4O2.2Rh/c4*1-2(3)4/h4*1H3,(H,3,4)/q2*+2/p-4 |
| InChIKey | ANSVJOOIUURYRN-UHFFFAOYSA-N |
| SMILES | CC1=O[Rh+2]234O=C(C)[O-][Rh+2]2(O=C(C)[O-]3)(O=C(C)[O-]4)[O-]1 |
Sicherheit & Vorschriften
| Wassergefährdungsklasse (WGK) | 3 |
|---|---|
| TSCA-Inventar-Status | No |
| Zollcode | 28439000 |
| RTECS-Nr. | VI9361000 |
| R-Sätze (R) | 36/38 |
| Gefahrensymbole | Xi |
| Sicherheitshinweise (S) | 37/39-26-15 |
| Lagerklasse | 11 - Combustible Solids |
| Gefahrenklasse | Eye Irrit. 2Skin Irrit. 2 |
Anwendungen & Verwendung
Verwenden
Rhodium (II) Acetate Dimer is a effective catalyst for ylide formation and it is also catalyst for cyclopropanation of alkenes, oxidation of alcohols, cyclization reactions involving -diazo carbonyl groups, insertion into C-H and X-H bonds (X-H is NH or SH or OH). More reactive and useful in differentiating ribonucleosides and deoxynucleosides. It is also used in functionalizing fullerenes into polymers. Efficient catalyst for hydrogen transfer from 2-propanol to cyclohexanone and other unsaturated compounds.
Herstellung & Synthese
synthetische
Rhodium(II) acetate dimer synthesis: A suspension of 10.0g. of Rh(OH)3.H20 in 400 ml. of glacial acetic acid dissolved upon refluxing for 18 hr. to give a deep emerald-green solution. Most of the acetic acid was evaporated on a steam bath; remaining traces mere removed by heating the residue at 120° for 1hr. The residue was then extracted with boiling acetone until the extract was colorless rather than bluish green. The extract was quickly passed through a fritted glass filter, concentrated on a steam bath to 1/3 its original volume, and placed in the freezing compartment of a refrigerator for 18hr. The resulting large dark green crystals were collected on a filter, washed with small portions of ice-cold acetone, and dried at 110°. When first collected, the product is the weak adduct [Rh(OOCCH3)2(CH3)2C0]2; however, acetone is lost fairly readily at room temperature and immediately in the drying oven; yield, 6.2g. (48%).