Nitrosamines: A challenge for theory and experiment

Igor Novak, Branka Kovac

Research output: Contribution to journalArticle

4 Citations (Scopus)


The electronic structure of 1-nitrosopyrrolidine has been investigated by HeI and HeII UV photoelectron spectroscopy and DFT/CCSD/OVGF calculations. Even high-levels of theory and large basis sets failed to reproduce the measured molecular structure or vertical ionization energies in a consistent manner. The unexpectedly large intensity enhancement of the band corresponding to HOMO ionization was observed in the HeII photoelectron spectrum of 1-nitrosopyrrolidine. Our results indicate that the HOMO and SHOMO ionizations in N-nitrosamines have r and p characters, respectively rather than the reverse as was previously thought. We relate the electronic structure to the genotoxic, carcinogenic properties of N-nitroso compounds.
Original languageEnglish
Pages (from-to)129-132
Number of pages4
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - Sep 2007

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