15-Crown-5

15-crown-5 Cas: 33100-27-5 is a colorless viscous liquid with boiling points of 115-116 ℃ (240Pa), 93-96 ℃ (18.3Pa), 78 ℃ (6.67Pa), relative density of 1.113 (20/4 ℃), and refractive index of 1.4615. 18-Grown-6,1,4,7,10,13,16-Hexaoxacy clooctadacane, white crystals. Melting point 38-39.5 ℃, boiling point 116 ℃ (26.6Pa). Crown ethers, also known as macrocyclic ethers, are macrocyclic compounds containing multiple oxygen atoms. When naming, mark the total number of atoms contained on the ring before the word "crown", and the number of oxygen atoms contained after the name. This was accidentally discovered by Pedersen of DuPont in 1967, and it was found that this type of compound has many abnormal properties. 15-crown-5 is a colorless, transparent, viscous liquid that is easily hygroscopic and soluble in water. It is soluble in organic solvents such as ethanol, benzene, chloroform, and dichloromethane, and has strong selective complexation ability for sodium ions. It is an efficient phase transfer catalyst and complexing agent. 15-crown-5 is used as a phase transfer catalyst in organic synthesis chemistry; Chelating agents, extractants for the separation and extraction of precious metals and rare earth elements, ion conductive materials for the electronic industry, and materials for the production of liquid crystal display elements。