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Quantitative study of the quasiequilibrium in the system (hydroxo)oxo-(5,10,15,20-tetraphenylporphynato)-molybdenum(V)-piperidine in toluene medium

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Abstract

The quasiequilibrium interaction of (hydroxo)oxo-(5,10,15,20-tetraphenylporphynato)molybdenum(V) and piperidine in the toluene medium has been studied by means of chemical kinetics and spectrophotometric titration. It has been revealed that the molecular complex formation proceeds as slow irreversible salt formation reaction. It is preceded by the stages of equilibrium substitution of the hydroxo group OH-with piperidine, the outer sphere cationic complex formation [K 1 (2.03±0.28)×103 M−1]; and by the coordination of the second piperidine molecule to the cationic complex (K 2 1.76±0.39 M−1). The complex formation has been completely kinetically described: the rate equations and rate constants have been derived, and the rate limiting stage has been identified. In addition, the physicochemical data on the intermediates and products are presented. The prospects of application of the mixed porphyrin-containing complex as piperidine receptor, alkaloids and pharmaceuticals building block, have been justified.

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Authors and Affiliations

  1. Krestov Institute of Solution Chemistry, ul. Akademicheskaya 1, Ivanovo, 153045, Russia

    E. V. Motorina & T. N. Lomova

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  1. E. V. Motorina
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  2. T. N. Lomova
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Correspondence to T. N. Lomova.

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Original Russian Text © E.V. Motorina, T.N. Lomova, 2013, published in Zhurnal Obshchei Khimii, 2013, Vol. 83, No. 7, pp. 1187–1196.

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Motorina, E.V., Lomova, T.N. Quantitative study of the quasiequilibrium in the system (hydroxo)oxo-(5,10,15,20-tetraphenylporphynato)-molybdenum(V)-piperidine in toluene medium. Russ J Gen Chem 83, 1435–1443 (2013). https://doi.org/10.1134/S1070363213070220

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  • DOI: https://doi.org/10.1134/S1070363213070220

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