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The Radical Anions of syn ‐1,6:8,13‐Bridged [14] Annulenes. A Compilation of Hyperfine Data
Author(s) -
Gerson Fabian,
Knöbel Jürgen,
Lopez Javier,
Vogel Emmanuel
Publication year - 1985
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19850680211
Subject(s) - chemistry , annulene , hyperfine structure , planarity testing , coupling constant , perimeter , hyperfine coupling , crystallography , computational chemistry , photochemistry , radical , atomic physics , geometry , quantum mechanics , physics , organic chemistry , mathematics
Hyperfine coupling constants and g‐factors determined by ESR and ENDOR spectroscopy are given for the radical anions of 21 syn ‐1,6:8,13‐bridged [14]annulenes. The great majority of these values is reported for the first time. The hyperfine data are consistent with the single occupancy of an orbital which resembles a π‐perimeter‐LUMO of the same nodal properties. The sum of the coupling constants of the protons attached to the π‐perimeter can be used as a planarity criterion for this perimeter.