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Abstract
The 14N NQR spectra are studied in ten substituted aziridines. The electron distribution in three-membered rings is discussed using the NQR data. The variation of the nitrogen orbital electron populations with substituents, as well as comparison of the 14N NQR spectra in aziridines and amides having the same substituents, agrees with the three-centre-bonding scheme (except chloroaziridine).