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:
无色透明粘稠液体,吸湿,与水混溶。可溶于乙醇、苯、氯仿、二氯甲烷等有机溶剂。对Na+选择络合力强。
熔点:110℃
沸点:116 °C / 1.8mmHg
折光率:1.465
密度:1.11
Quality Standard:
外观Appearance 无色至亮黄色液体
红外光谱鉴别Infrared spectrometry 和对照品匹配
纯度Purity ≥97.0%(GC)
折光率Refractive index n20/D 1.4640 - 1.4670
相对密度Specific gravity (20/20°C) 1.8800 - 1.8850
Storage:
用途 冠醚最主要的特点之一,是可与各种金属盐、铵盐、有机阳离子化合物等形成稳定的络合物。利用这一性质,可将各种盐类溶于有机溶剂。冠醚可将阳离子螯环内,同时由于有朝外的有机基因可生成络合物,亦可溶于非极性的有机溶剂。这时,未被溶剂化的阴离子,以裸露的阴离子形式存在于溶剂中,故活性极大。冠醚可使碱金属和有机碱金属化合物溶解在有机溶剂中。因而在有机合成、光学拆分、重金属螯合、分离、分析以及生理活性的医药、生物化学等方面找到广泛的应用。例如,用作相转移催化剂,使许多在传统条件下难以反应,甚至不发生的反应,能顺利地进行,这类反应速率快、条件简单、操作方便、产率高。例如,安息香在水溶液中的缩合反应产率极低,如果在该水溶液中加入7%的冠醚,则可得到产率为78%的安息香。这一反应还可在苯(或乙腈)中进行,尽管氰化钾不溶于苯,但如果加入18-冠-6,则不仅能发生反应,而且产率可高达95%。
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