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- W1966658849 abstract "Polarographic examination of title compound (0.2 mol m−3) in 10% ethanolic Britton—Robinson universal buffers (ionic strength, 0.5 mol dm−3 with added KCl), using gelatin (0.004%) as maximum suppressor, and its millicoulometry reveal two two- and four-electron steps in acidic solutions, which merge into one wave at intermediate pH-values, and separate out again into two waves of varying heights in the alkaline pH-range. That the second four-electron step involves splitting of the two CI bonds has been prove by recording anodic waves for the liberated iodide ions (i) by using Kalousek commutator technique, and (ii) after carrying out cpe. The other product of cpe has been identified as fluorescin (leuco-fluorescein) by polarographic comparison of its aerial oxidation product with authentic fluorescein. The low negative halfwave potential of the first wave indicates that the title compound is reduced in the more readily reducible quinonoid form or as its ionic mesomer instead of in the difficultly reducible lactoid (furanoid) form as suggested by the earlier workers. Further, we did not obtain any significant evidence for the opening of the pyrone ring as suggested by them. The course of electrode process at various pH-values has been suggested." @default.
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- W1966658849 date "1979-11-01" @default.
- W1966658849 modified "2023-09-27" @default.
- W1966658849 title "Polarographic studies on 4,5-DIIODO-(R)-fluorescein" @default.
- W1966658849 cites W1983281154 @default.
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- W1966658849 doi "https://doi.org/10.1016/0013-4686(79)87065-6" @default.
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