Abstract
The 13C and 1H NMR spectra of 1-arylaziridines, 2-phenyl-1-arylaziridines, and 2-aryl-1-phenylaziridines were studied. The additive contributions of aziridinyl, 1-phenyl-2-aziridinyl, and 2-phenyl-1-aziridinyl substituents to the shielding of the aromatic protons were calculated. It is shown that with respect to its donor capacity the aziridine ring occupies an intermediate position between amines and amides. The temperature dependences of the PMR spectra of 1-aryl-substituted aziridines were investigated, and the barriers to inversion of the latter were calculated. The dependence of ΔG≠ on the σ− constants was correlated.
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