Dibenzo-18-crown-6 14187-32-7 C20H24O6

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Product Name: Dibenzo-18-crown-6 Synonyms: CROWN ETHER/DIBENZO-18-CROWN-6;DIBENZO-18-CROWN-6;dibenzo[b,k][1,4,7,10,13,16]hexaoxacyclooctadecin,6,7,9,10,17,18,20,21-octahyd;dibenzo[bk][1,4,7,10,13,16]hexaoxacyclooctadecane;Dibenzocrown;Diphenyl-18-crown-6-polyether;k](1,4,7,10,13,16)hexaoxacyclooctadecin,6,7,9,10,17,18,20,21-octahydro-Dibenzo[b;6,7,9,10,12,13,20,21-Octahydrodibenzo[b,k][1,4,7,10,13,16]hexaoxacyclo-octadecin CAS: 14187-32-7 MF: C20H24O6 MW: 360.4 EINECS: 238-041-3 Product Categories: crown ether;API intermediates;Crown Ethers;Functional Materials;Macrocycles for Host-Guest Chemistry Mol File: 14187-32-7.mol Dibenzo-18-crown-6 Chemical Properties Melting point  162-164 °C (lit.) Boiling point  380-384 °C (679 mmHg) density  1.1801 (rough estimate) refractive index  1.5200 (estimate) Fp  380-384°C/679mm storage temp.  Store below +30°C. solubility  0.007g/l form  Fluffy Powder color  White to slightly beige Water Solubility  sparingly soluble λmax 277nm(CH2Cl2)(lit.) Sensitive  air sensitive Merck  14,2602 BRN  1162153 InChI 1S/C20H24O6/c1-2-6-18-17(5-1)23-13-9-21-11-15-25-19-7-3-4-8-20(19)26-16-12-22-10-14-24-18/h1-8H,9-16H2 InChIKey YSSSPARMOAYJTE-UHFFFAOYSA-N SMILES C1COc2ccccc2OCCOCCOc3ccccc3OCCO1 CAS DataBase Reference 14187-32-7(CAS DataBase Reference) NIST Chemistry Reference Dibenzo-18-crown-6(14187-32-7) EPA Substance Registry System Dibenzo[b,k][1,4,7,10,13,16]hexaoxacyclooctadecin, 6,7,9,10,17,18,20,21-octahydro- (14187-32-7) Safety Information Hazard Codes  Xi,Xn Risk Statements  36-36/37/38-20/21/22 Safety Statements  26-37/39-36 WGK Germany  2 RTECS  HP5386000 Hazard Note  Irritant TSCA  TSCA listed HS Code  29329995 Storage Class 11 - Combustible Solids Toxicity LD50 orally in Rabbit: 2600 mg/kg MSDS Information Provider Language 2,3,11,12-Dibenzo-1,4,7,10,13,16-hexaoxacyclooctadeca-2,11-diene English SigmaAldrich English ACROS English ALFA English Dibenzo-18-crown-6 Usage And Synthesis Description Dibenzo-18-crown-6 (DB18C6) is the first crown ether synthesized by Pedersen in 1967 and has the strongest binding affinity to a potassium cation (K+) among alkali metal cations. With the similarity of the sizes between K+ and the cavity of crown ether, it had long been believed that the binding selectivity comes from the size relationship between the metal cation and the cavity. However, it was reported that under identical experimental conditions, K+ bound strongly to all crown ethers (12-crown-4 to 24-crown-8) irrespective of the ring size among other cations such as Na+, Ca2+, and NH4+. Moreover, in the gas phase, 18-crown-6 (18C6) and dibenzo18-crown-6 (DB18C6) form preferential complexation in the order Li+ > Na+ > K+ > Rb+ > Cs+, while in the aqueous solution both of them show highest complexion capacity for K+ rather than Li+[1-2]. Chemical Properties white to slightly beige fluffy powder Uses Dibenzo-18-crown-6, is used as an important raw material and intermediate used in organic Synthesis, pharmaceuticals, agrochemicals and dyestuff. It is an important organic intermediate. Uses Crown ether/Dibenzo-18-crown-6 for synthesis. CAS 14187-32-7, molar mass 360.41 g/mol. Definition ChEBI: Dibenzo-18-crown-6 is a crown ether that is 18-crown-6 ortho-fused to two benzene rings at positions 8-9 and 17-18. It has a role as a phase-transfer catalyst. It is a member of benzenes and a crown ether.

First aid measures

General advice Consult a physician. Show this material safety data sheet to the doctor in attendance. If inhaled If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician. In case of skin contact Wash off with soap and plenty of water. Consult a physician. In case of eye contact Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. If swallowed Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

Firefighting measures

Suitable extinguishing media Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Special hazards arising from the substance or mixture Carbon oxides Nitrogen oxides (NOx) Advice for firefighters Wear self-contained breathing apparatus for firefighting if necessary.



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