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Thermodynamic parameters of free radical-dimer equilibria in phenylindandione derivatives

  • Physical Chemistry
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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

Measurements of the thermodynamic parameters of the free radical-dimer equilibrium in benzene for 2,2′-bis[R-2-(p-dimethylaminophenyl)indan-1,3-diones] with different substituants R on the phthaloyl ring have been carried out. The equilibrium constants satisfy the Hammett equation (p=0.87, benzene, 20‡C). The bond breaking energy of the central C2−C2' bond in the dimers amounts to ∼18–20 kcal/mole The extinction coefficients of the 2-aryl-indan-1,3-dione-2-yl radicals in benzene have been determined. The long-wave band of the radicals displays thermo- and solvatochromism.

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Authors and Affiliations

  1. Chernogolovka Branch, Institute of Chemical Physics, Academy of Sciences of the USSR, USSR

    L. M. Pisarenko, V. I. Nikulin & A. B. Gagarina

Authors
  1. L. M. Pisarenko
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  2. V. I. Nikulin
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  3. A. B. Gagarina
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1237–1243, June, 1988.

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Pisarenko, L.M., Nikulin, V.I. & Gagarina, A.B. Thermodynamic parameters of free radical-dimer equilibria in phenylindandione derivatives. Russ Chem Bull 37, 1086–1091 (1988). https://doi.org/10.1007/BF00961905

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  • DOI: https://doi.org/10.1007/BF00961905

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