14262-61-4

Basic information

• Product Name: [2,4!-DIBENZO-18-CROWN-6, 99+%
• Synonyms: [2,4!-DIBENZO-18-CROWN-6, 99+%;2,4a-DIBENZO-18-CROWN-6, 99+%
• CAS NO: 14262-61-4
• Molecular Formula: C₂₀H₂₄O₆
• Molecular Weight: 360.404
• Mol File: 14262-61-4.mol

Chemical Properties

• Melting Point: 117-120°C
• Boiling Point: 452.43°C (rough estimate)
• Flash Point: 204.6°C
• Appearance: /
• Density: 1.1801 (rough estimate)
• Vapor Pressure: 1.19E-09mmHg at 25°C
• Refractive Index: 1.5200 (estimate)
• CAS DataBase Reference: [2,4!-DIBENZO-18-CROWN-6, 99+%(CAS DataBase Reference)
• NIST Chemistry Reference: [2,4!-DIBENZO-18-CROWN-6, 99+%(14262-61-4)
• EPA Substance Registry System: [2,4!-DIBENZO-18-CROWN-6, 99+%(14262-61-4)

Safety Data

• Hazardous Substances Data: 14262-61-4(Hazardous Substances Data)

Usage

Chemical Properties

light beige amorphous powder

InChI:InChI=1/C20H24O6/c1-3-7-19-17(5-1)23-13-11-21-9-10-22-12-14-24-18-6-2-4-8-20(18)26-16-15-25-19/h1-8H,9-16H2

Upstream product

• 20115-81-5 1,2-bis(o-hydroxyphenoxy)ethane 
• 19249-03-7 triethylene glycol di-(p-toluenesulfonate) 
• 112-26-5 1,2-bis(2-chloroethoxy)ethane 
• 80322-82-3 triethyleneglycol dimesylate 
• 4672-49-5 1,2-bis(methanesulfonyloxy)ethane 
• 68822-97-9 1,8-bis(2-hydroxyphenoxy)-3,6-dioxaoctane 
• 106-93-4 ethylene dibromide 

Relevant articles and documents

Preparation of benzo- and polybenzocrown ethers by macrocyclization reactions

Macrocyclization of crown ethers and their methods of preparation were explored. We present a robust, scalable method for the preparation of these macrocycles. Additionally, the effect of changing the structures of the precursors was explored to determine whether the 'cut' of bisphenol and dimesylate influenced the course of the reaction as measured by the yield. Further, using catechol derivatives, the method was used for the preparation of monobenzocrown ethers. Interestingly, for the preparation of monobenzocrown ethers, [2+2] adducts were discovered to be significantly contaminating the products. Dimesylates were chosen as the leaving group due to their ease or preparation and the ability to use the unpurified products with no apparent impact on the macrocyclization.

An Improved Method for Preparing Dibenzo Crown Ethers

In synthesis of symmetrical and unsymmetrical dibenzo crown ethers, the use of dimethyl sulfoxide as a solvent in cyclization allows an increase in the yields, a significant reduction in the reaction time, and simplification of refining.

Multiple Benzo-fused Crown Ethers - Synthesis, Ion Selectivities in Membrane Electrodes and Inclusion of Water

New oligo-benzo-condensed crown-6 ligands 4, 6 - 9 having a different gradation of lipophilicity and of molecular rigidity are synthesized.For the known ligands 3 and 5 of similar constitution improved methods of preparation are described.The carrier efficiencies and ion selectivities of the various ligands for alkali and alkaline earth metal ions in liquid membrane electrodes of different composition are determined and discussed on the basis of the potentiometric selectivity factors lgKPotMgM.The possible behaviour of the new macrocycles in molecular inclusion is studied.A stable crystal lattice inclusion compound of 4 with water of composition 4*1/2 H2O is obtained.