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Communication | Special issue | Vol 18, No. 1, 1982, pp.57-61
Published online, 1st January, 1970
DOI: 10.3987/S(B)-1982-01-0057
Synthetic Macrocyclic Ligands. V. “Crowned” Dinitrophenylazophenols: Dissolving and Colorating Agent of Alkali and Alkaline Earth Metal Salts in Organic Solvents

Kouichi Sugihara, Takahiro Kaneda, and Soichi Misumi*

*The Institute of Scientific and Industrial Research, Osaka University, 8-1. Mihogaoka, Ibaraki, Osaka 567-0047, Japan


The complexations of the title compounds with a series of alkali and alkaline earth metal salts were studied under various conditions, e.g., amine, solvent, etc. A solution of azophenol 21-pyridine in chloroform displayed a noticeable metal-cation selective coloration for lithium salts of alkali metal salts.