非表示:
キーワード:
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要旨:
Electron impact (EI)-induced cyclizations of 1,16-diaza[6]helicene (1), of 1,14-diaza[6]helicene (2) and of 3,14-diaza[6]helicene (3) to monoazacoronenes (abundant loss of HCN and H) were investigated through their source spectra supported by accurate mass measurements, their unimolecular metastable ion (MI) spectra, and their high-energy (8KeV) collision-induced dissociation (CID) tandem mass spectra obtained with a four-sector mass spectrometer.
Electron impact (EI)-induced cyclizations of diaza[6]helicenes (1–3) to monoazacoronenes were investigated through their mass spectra obtained with a four-sector mass spectrometer.
