Conclusions
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1.
It has been established by x-ray structure analysis that 5,5-dimethyl-1-pyrazolinio-Z-phthalimidoimidate exists in the Z,E-configuration. The basic relationships in structure of a new class of 1,3-bipolar compounds, azimines, have been established through a comparative analysis of literature data.
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2.
The similarity in structure between this compound and the sterically unstrained Z,E-2,3-dimethyl-1-phthalimidoazimine is fully consistent with the ease of addition of phthalimidonitrene to Z-azo compounds.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1084–1088, May, 1989.
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Blank, I.B., Yanovskii, A.I., Struchkov, Y.T. et al. Crystalline and molecular structure of 5,5-dimethyl-1-pyrazolinio-z-phthalimidoimidate. Russ Chem Bull 38, 981–985 (1989). https://doi.org/10.1007/BF00955429
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DOI: https://doi.org/10.1007/BF00955429