Conclusions
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1.
The reaction of 1-fluoroacyl-1,2-dimethylhydrazides with phenol and trifluoroacetic acid in a medium of CCl4 and MeCN takes place with the formation of a molecular H complex, and the oxygen atom in the C=O group is the H bond acceptor in the hydrazides.
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2.
Decomposition of the three-component associates of 1-fluoroacyl-1,2-dimethylhydrazides and protonation of the nitrogen atom in a medium of MeCN take place in the reaction of these molecules with perchloric, picric, and hydrochloric acids.
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3.
The ratio of the free forms and the forms of the hydrazides protonated with respect to the N2 atom is dependent on the inductive properties of the R substituent in the acyl fragment. The smallest contribution of the protonated form is observed with R=CF3, and the strength of the NH...N2 bond is highest.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1038–1041, May, 1986.
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Sarapulova, G.I., Chipanina, N.N., Kashik, T.V. et al. Spectroscopic study of the reaction of acids with 1-fluoroacetyl-1,2-dimethylhydrazines. Russ Chem Bull 35, 942–945 (1986). https://doi.org/10.1007/BF00955354
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DOI: https://doi.org/10.1007/BF00955354