52902-52-0

Basic information

• Product Name: 27-Crown-9
• CAS NO: 52902-52-0
• Molecular Weight: 396.478
• Mol File: 52902-52-0.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 27-Crown-9(CAS DataBase Reference)
• NIST Chemistry Reference: 27-Crown-9(52902-52-0)
• EPA Substance Registry System: 27-Crown-9(52902-52-0)

Safety Data

• Hazardous Substances Data: 52902-52-0(Hazardous Substances Data)

Upstream product

• 112-27-6 2,2'-[1,2-ethanediylbis(oxy)]bisethanol 

Relevant articles and documents

TEMPLATE EFFECTS. 7. LARGE UNSUBSTITUTED CROWN ETHERS FROM POLYETHYLENE GLYCOLS: FORMATION, ANALYSIS, AND PURIFICATION

Through the reaction of polyethylene glycols with tosyl chloride and heterogeneous KOH in dioxane not only coronands from crown-4 to crown-8 can be obtained but also larger homologues.A systematic investigation has shown that: i) crown-9 and crown-10 can be formed from nona- and deca-ethylene glycol, respectively, and isolated in pure form; ii) the whole series of polyethylene glycols from tri- to deca-ethylene glycol yields not only the corresponding crown ethers but also higher cyclooligomers that can be analyzed up to about crown-20 by glc: in particular crown-12 and crown-16 were obtained from tetraethylene glycol and purified by column chromatography on cellulose; iii) the reaction, as applied to commercial mixtures of polyethylene glycols (from PEG 200 to PEG 1000), gives fairly high yields of crown ethers also in the region of large ring sizes.The contribution of the template effect of K(+) ion and the cyclooligomerization reactions for the various ring sizes are discussed.