325473

Selendioxid

reagent grade, powder, 98%

• Synonym(e): NSC 56753, Selen(IV)-oxid
• Lineare Formel: SeO₂
• CAS-Nummer: 7446-08-4
• Molekulargewicht: 110.96
• EG-Nummer: 231-194-7
• MDL-Nummer: MFCD00003562
• UNSPSC-Code: 12352303
• PubChem Substanz-ID: 24859512
• NACRES: NA.22

Eigenschaften

• Qualität: reagent grade
• Qualitätsniveau: 200
• Dampfdruck: 1 mmHg ( 157 °C)
• Assay: 98%
• Form: powder
• Eignung der Reaktion: reagent type: oxidant
• Farbe: off-white to pink
• mp (Schmelzpunkt): 315 °C (subl.) (lit.)
• SMILES String: O=[Se]=O
• InChI: 1S/O2Se/c1-3-2
• InChIKey: JPJALAQPGMAKDF-UHFFFAOYSA-N

Beschreibung

Anwendung

Selenium dioxide (SeO₂) is mainly used to oxidize the α-methylene carbon atoms adjacent to a double bond to form allylic hydroxy derivatives.
Other applications:

• SeO₂ reacts with olefins in the presence of tert-butyl hydrogen peroxide to form allylic alcohols without the formation of rearrangement or dehydration by-products. This reagent system is also useful for the oxidation reactions of acetylenic fatty esters.
• SeO₂ can be used for the oxidation of 1,3,5-cycloheptatriene to form tropone.
• Piperidoindole systems on oxidation with SeO₂ forms either 2-acyl- or 3-acyl-indoles or fully aromatic β-carbolines, depending on the starting material.
• SeO₂ reacts with chlorotrimethylsilane to form selenium oxychloride in situ, which is an effective chlorinating reagent for alcohols. This reagent is a better alternative to thionyl chloride and other chlorinating agents.

Sicherheitshinweise

• Piktogramme: GHS06,GHS08,GHS09
• Signalwort: Danger
• H-Sätze: H301 + H331,H373,H410
• P-Sätze: P260 - P264 - P273 - P301 + P310 - P304 + P340 + P311 - P314
• Gefahreneinstufungen: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
• Lagerklassenschlüssel: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges