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Spectrophotometric Investigation of the Reaction of Cu(II) Ions with N-Benzoyl-N'-(phenylsulphonyl)hydrazine in Ammonia Media

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Abstract

We investigated the complexation reaction of N-benzoyl-N'-(phenylsulfonyl)hydrazine with Cu(II) ions in an ammonia medium. The absorption spectra of the reagent and its complex compound with Cu(II) ions were recorded and analyzed. Optimal conditions for complex formation were determined, including the pH range for complexation, the optimal time for color development, and the amount of photometric reagent. Under optimal conditions, a calibration curve for the complexation of BFSH with Cu(II) ions was plotted. The Beer–Lambert–Bouguer law is valid in the range from 0.5 to 1.75 mg of Cu(II) in 25 mL of the solution. The true (19 389 cm2/mol) and apparent (4708 cm2/mol) molar absorption coefficients were calculated. Using the methods of saturation, equilibrium shift, curve intersection, isomolar series, and conductometric titration, the molar ratios in the solution of the complex compound were determined as [Cu(II)] : [BFSH] = 1 : 1 and 1 : 2. The conditional stability constant of the complex, calculated using the Babko method, is 2.45 × 1013. The convergence and accuracy of the spectrophotometric method were determined statistically.

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Funding

This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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Authors and Affiliations

  1. Perm State National Research University, 614990, Perm, Russia

    Yu. B. Elchishcheva, A. S. Sorokina & P. T. Pavlov

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  1. Yu. B. Elchishcheva
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  2. A. S. Sorokina
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  3. P. T. Pavlov
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Correspondence to Yu. B. Elchishcheva.

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The article underwent additional review by Reviews and Advances in Chemistry and was revised before its publication in Reviews and Advances in Chemistry, as compared to the version published in Russian.

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Translated by O. Zhukova

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Elchishcheva, Y.B., Sorokina, A.S. & Pavlov, P.T. Spectrophotometric Investigation of the Reaction of Cu(II) Ions with N-Benzoyl-N'-(phenylsulphonyl)hydrazine in Ammonia Media. rev. and adv. in chem. 13, 286–295 (2023). https://doi.org/10.1134/S2634827623600160

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