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The rate of N inversion in aziridine derivatives is found to depend upon intramolecular interactions between the aziridine N and attached functional groups, thus allowing specific noncovalent interactions to be studied. The ortho‐substituted pyridine undergoes faster inversion as a result of the formation of an intramolecular amide–pyridine (NH⋅⋅⋅N) hydrogen bond in its transition state (see scheme).
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