Trifluoromethyl-substituted chromogenic crown ethers and methods

Details Trifluoromethyl-substituted chromogenic crown ethers and methods Trifluoromethyl-substituted chromogenic crown ethers and methods

1982-06-07

1984-03-13

Love, Ethel G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

436 74, 436 79, C07D32300

Patent

active

044369239

ABSTRACT:
Two novel trifluoromethyl-substituted chromogenic crown ethers are disclosed, 4'-(2",6"-dinitro-4" trifluoromethylphenyl) aminobenzo-15-crown-5 and 4'-(2",4"-dinitro-6"-trifluoromethylphenyl) aminobenzo-15-crown-5. These compounds are useful as reagents for the extraction and spectrophotometric determination of potassium in the presence of sodium. The compounds, their methods of manufacture, and methods of utilizing the compounds for the analysis of potassium are disclosed and claimed.

REFERENCES:
Chem. Abstracts 95: 107924t.
G. E. Pacey & B. P. Bubnis, A New Chromogenic Crown Ether 4"-Cyano-2",6"-Dinitro-4'-Aminobenzo-15-Crown-5 as an Alkali Metal Extraction Reagent, Analytical Letters, 13(A12), 1085-1091 (1980).
Nakamura, H., Takagi, M., Ueno, K., Complexation and Extraction of Alkali Metals Ions by 4'-Picrylaminobenzo-18-Crown-6 Derivatives, Anal. Chem., 1980, 52, 1668.
Nakamura, H., Takagi, M., Ueno K. Photometric Reagents and Alkali Metal Ions, Based on Crown-Ether Complex Formation-III, 4'-Picrylaminobenzo-15-Crown-5 Derivatives, Talanta, 1978, 26, 921.
Takagi, M., Nakamura, H., Ueno, K., A Novel Colorimetric Reagent for Potassium Based on Crown Ether Complex Formation, Anal. Lett., 1977, 10, 1115.

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