Alkali and Alkaline Earth Perchlorate and Picrate Complexes with Some Macrocyclic Polyethers
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چکیده
Crystalline complexes of some alkali and alkaline earth Perchlorates and picrates with macrocyclic polyethers have been synthesized. With the alkyl substituted aromatic macrocyclic polyethers bis(3,5-di-£er£-butylbenzo)-18-crown-6 and bis(4-hexadecylbenzo)-18crown-6 it was not possible to isolate all the complexes in the crystalline form. In fact the steric hindrance, caused by the alkyl substituents, affects the stability of the complexes and hinders the possibility of isolation. It has been observed that also the molecular structure and the electronic configuration of the anion are important factors in determing the formation of crystalline complexes. The complexes obtained were identified and characterized by elemental analysis, IR, UV and iH NMR spectra, conductivity and x-ray powder analysis.
منابع مشابه
Pedersen C J. Cyclic polyethers and their complexes with metal salts. J. Amer. Chem. Soc. 89:7017-36. 1967
• The discovery of the first crown ether is described. Forty-seven other aromatic and saturated polyethers were synthesized and their properties determined. Many form stable crystalline complexes with alkali and alkaline earth salts. Some saturated crown ethers solubilize potassium hydroxide and permanganate in aromatic hydrocarbons, EThe SC!5 indicates that this paper has been cited in over 1,...
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