8.00653
Selenium dioxide
(sublimed) for synthesis
别名:
Selenium dioxide, Selenious anhydride, Selenium(IV) oxide
蒸汽压
<1 Pa ( 20 °C)
质量水平
表单
crystals
效能
68.1 mg/kg LD50, oral (Rat)
反应适用性
reagent type: oxidant
pH值（酸碱度）
2 (20 °C, 10 g/L in H2O)
mp
340 °C
溶解性
1353 g/L
密度
3.95 g/cm3 at 20 °C
储存温度
2-30°C
SMILES字符串
[Se](=O)=O
InChI
1S/O2Se/c1-3-2
InChI key
JPJALAQPGMAKDF-UHFFFAOYSA-N
应用
Selenium dioxide (SeO2) is mainly used to oxidize the activated carbon-bearing positions (α-methylene carbon atoms), particularly at allylic or propargylic sites. The more substituted end of the double bond undergoes oxidation.
It can also be used as an oxidizing reagent to synthesize:
It can also be used as an oxidizing reagent to synthesize:
- Amides by oxidative amidation of aldehydes with amines.
- Tropone from cycloheptatriene in the presence of potassium dihydrogen phosphate.
- Acetyltetrahydrobenzofurans by oxidation of conjugated dienones.
- 9-hydroxy-undec-10-ynoate from methyl undec-10-ynoate.
分析说明
Assay (iodometric): ≥ 98.0 %
警示用语：
Danger
危险分类
Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
储存分类代码
6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
WGK
WGK 2
闪点(°F)
Not applicable
闪点(°C)
Not applicable
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