The ionization energies of the isomers of CN2

Jeremy Armstrong, Lovorka Degoricija, Anthony Hildebrand, Jessica Koehne, Patrick E. Fleming

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The geometries and harmonic vibrational frequencies for the structural isomers of CN2 and the corresponding cations are calculated at the B3LYP/6-311+g(2df) level. Adiabatic ionization energies are calculated at the G1, G2(MP2) and G2 levels for each of the isomers. Of the cations, the linear Cv molecule CNN+ is found to have the lowest energy. NCN+ (Dh) lies 0.2 eV higher in energy than CNN+. The CN+2 isomer has a cyclic structure with C2v symmetry. The adiabatic ionization energies of the radicals determined at the G2 level are IP(NCN, X̃3Σ-g) = 12.52 ± 0.07 eV, IP(CNN, X̃3Σ-) = 11.01 ± 0.07 eV and IP(cyc-CN2, X̃1A1) = 11.94 ± 0.07 eV.

Original languageEnglish (US)
Pages (from-to)591-596
Number of pages6
JournalChemical Physics Letters
Issue number5-6
StatePublished - Dec 29 2000
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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