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- W2314196664 abstract "The relationship between the structures and electronic ground state properties of non-Kekulé-type N-substituted m-phenylenes was studied utilizing density functional theory (DFT), with the aim of determining the factors that lead to ground state triplet diradicals. At B3LYP/6-311G(d,p)//B3LYP/6-311G(d,p) we identified octahydropyridoquinoline with an exceptionally large singlet−triplet energy separation of +27.9 kcal mol−1, in favor of the triplet. The high-spin structures can readily be obtained by interruption of the full cyclic π-delocalization that avoids cross-conjugation of the nitrogen radical centers. Introduction of additional heteroatoms, on the other hand, preferentially stabilizes the singlet zwitterionic resonance contributors in these systems. The identified diradicals show strong ferromagnetic exchange interactions between two radical centers." @default.
- W2314196664 created "2016-06-24" @default.
- W2314196664 creator A5027412086 @default.
- W2314196664 creator A5066817668 @default.
- W2314196664 date "2009-07-20" @default.
- W2314196664 modified "2023-09-25" @default.
- W2314196664 title "Non-Kekulé <i>N</i>-Substituted <i>m</i>-Phenylenes: <i>N</i>-Centered Diradicals versus Zwitterions" @default.
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- W2314196664 doi "https://doi.org/10.1021/jp9028672" @default.
- W2314196664 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19618943" @default.
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