15-Crown-5
Molecular Structure:
MDL:
MFCD00005110
Molecular Formula:
C10H20O5
Molecular Weight:
220.27
Alias:
15-冠-5,15-冠-5醚
Crown ethers
1,4,7,10,13-Pentaoxacyclopentadecane
Lead ionophore V
Product order:
Name |
Specifications |
Packing |
Price |
Delivery |
15-Crown-5 |
97% |
1g |
RMB 107.8 |
Consulting service |
15-Crown-5 |
97% |
5g |
RMB 281.6 |
Consulting service |
15-Crown-5 |
97% |
25g |
RMB 1056 |
Consulting service |
Character:
無色透明粘稠液體,吸濕,與水混溶??扇苡谝掖?、苯、氯仿、二氯甲烷等有機溶劑。對Na+選擇絡(luò)合力強。
熔點:110℃
沸點:116 °C / 1.8mmHg
折光率:1.465
密度:1.11
Quality Standard:
外觀Appearance 無色至亮黃色液體
紅外光譜鑒別Infrared spectrometry 和對照品匹配
純度Purity ≥97.0%(GC)
折光率Refractive index n20/D 1.4640 - 1.4670
相對密度Specific gravity (20/20°C) 1.8800 - 1.8850
Storage:
用途 冠醚最主要的特點之一,是可與各種金屬鹽、銨鹽、有機陽離子化合物等形成穩(wěn)定的絡(luò)合物。利用這一性質(zhì),可將各種鹽類溶于有機溶劑。冠醚可將陽離子螯環(huán)內(nèi),同時由于有朝外的有機基因可生成絡(luò)合物,亦可溶于非極性的有機溶劑。這時,未被溶劑化的陰離子,以裸露的陰離子形式存在于溶劑中,故活性極大。冠醚可使堿金屬和有機堿金屬化合物溶解在有機溶劑中。因而在有機合成、光學(xué)拆分、重金屬螯合、分離、分析以及生理活性的醫(yī)藥、生物化學(xué)等方面找到廣泛的應(yīng)用。例如,用作相轉(zhuǎn)移催化劑,使許多在傳統(tǒng)條件下難以反應(yīng),甚至不發(fā)生的反應(yīng),能順利地進(jìn)行,這類反應(yīng)速率快、條件簡單、操作方便、產(chǎn)率高。例如,安息香在水溶液中的縮合反應(yīng)產(chǎn)率極低,如果在該水溶液中加入7%的冠醚,則可得到產(chǎn)率為78%的安息香。這一反應(yīng)還可在苯(或乙腈)中進(jìn)行,盡管氰化鉀不溶于苯,但如果加入18-冠-6,則不僅能發(fā)生反應(yīng),而且產(chǎn)率可高達(dá)95%。
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