Abstract: | The PMR spectral data show that 1-aroyl-2-benzyl-5-hydroxypyrazolidines are preferentially present in cyclic form in solution, while the proportion of the linear form increases to 50% in the gaseous phase, according to mass spectra.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1199–1203, September, 1990. |