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Ring Currents in the Porphyrins: A Four‐Orbital Model
Author(s) -
Steiner Erich,
Fowler Patrick W.
Publication year - 2002
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/1439-7641(20020118)3:1<114::aid-cphc114>3.0.co;2-a
Subject(s) - porphin , ring (chemistry) , schematic , chlorin , ring current , chemistry , electron , photochemistry , perpendicular , porphyrin , molecular physics , atomic physics , magnetic field , physics , geometry , quantum mechanics , organic chemistry , earth's magnetic field , mathematics , electronic engineering , engineering
Just four electrons in each case dominate delocalised ring currents (see schematic diagram) in free‐base porphin, chlorin and magnesium porphin, as has been revealed by direct visualisation of the π current density. The remaining 22 π electrons (20 in chlorin) are magnetically inactive in the presence of a field perpendicular to the molecular plane.