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Study of the temperature dependence of the free energies of activation of rotations around the C = C and C-N bonds in dienic δ-aminocarbonyl compounds by the PMR method

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Conclusions

  1. 1.

    On the basis of the dependence of the rate constants of processes of rotation around C = C and C-N bonds in dienic δ-aminocarbonyl compounds on the temperature found, the entropies of activation of these processes were calculated.

  2. 2.

    Increasing the temperature by 100° leads to an increase in ΔG C = C of 3 kcal/mole. The dependence of ΔG C = C on the temperature can be neglected in view of the fact that the value of ΔS C = C is close to zero.

  3. 3.

    Methods of calculation are cited, permitting a reduction of the influence of systematic errors in the values of the parameters of activation and an estimation of their magnitude.

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Literature cited

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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 61–68, January, 1975.

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Prokof'ev, E.P., Krasnaya, Z.A. Study of the temperature dependence of the free energies of activation of rotations around the C = C and C-N bonds in dienic δ-aminocarbonyl compounds by the PMR method. Russ Chem Bull 24, 53–58 (1975). https://doi.org/10.1007/BF00926291

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Keywords

  • Entropy
  • Free Energy
  • Systematic Error