Conclusions
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1.
The model of associations monomer ⇌ cyclic dimer, proposed earlier for dimethylhydrazines (DMH), is incorrect.
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2.
Association occurs according to the scheme monomer ⇌ cyclic n-mer with n=3 for 1,1-DMH and n=3 and 4 for 1,2-DMH.
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3.
The association constants were determined for a number of temperatures, enthalpies and entropies of formation of associates, as well as average values of the hydrogen bond energy for the models considered.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1284–1287, June, 1972.
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Yunda, N.G., Lagodzinskaya, G.V. & Manelis, G.B. Study of the autoassociation in hydrazines by the NMR method. Russ Chem Bull 21, 1240–1242 (1972). https://doi.org/10.1007/BF00854535
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DOI: https://doi.org/10.1007/BF00854535