Conclusions
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1.
In the electronic absorption spectra of aqueous solutions of cobalticinium compounds in the visible region of 330–500 nm, donor and acceptor substituents cause an insignificant bathochroraic shift of the long-wave absorption band of 405–415 nm.
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2.
The intensity of the long-wave band depends on the nature of the substituent and the anion and practically does not depend on the pH of the medium.
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3.
A spectrophotometric method has been developed for quantitative determination of various salts of cobalticinium derivatives in aqueous solutions in a wide pH range.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1325–1328, June, 1983.
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Rukhlyada, N.N., Leonova, E.V., Kochetkova, N.S. et al. Visible absorption spectrum of cobalticinium salts with donor and acceptor substituents. Russ Chem Bull 32, 1196–1200 (1983). https://doi.org/10.1007/BF00953156
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DOI: https://doi.org/10.1007/BF00953156