| Abstract: | The 1H- and 13C-NMR spectral parameters of N-vinyltetrazoles have been analyzed. It has been found that rotational isomerism is inherent to 1- and 2-vinyltetrazoles. A quantitative estimate of the ratio of rotational isomers has been made. In the case of 1-vinyltetrazoles, introduction of a substituent to the 5-position in the tetrazole ring stabilizes the trans-orientation of the vinyl group relative to the substituent, while in the case of 2-vinyltetrazoles the presence of a substituent in the 5-position of the ring essentially does not affect the conformer population.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1662–1667, December, 1989. |
