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Die ESR.‐Spektren der Radikal‐Ionen des trans ‐15, 16‐Dimethyldihydropyrens und seines Semichinons
Author(s) -
Gerson F.,
Heilbronner E.,
Boekelheide V.
Publication year - 1964
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.19640470503
Subject(s) - chemistry , unpaired electron , radical ion , butane , ion , crystallography , medicinal chemistry , stereochemistry , radical , organic chemistry , catalysis
The observed spin densities for the radical cation and anion of trans ‐15,16‐di‐methyl‐dihydropyrene (I) are in good agreement with MO predictions based on unrestrained delocalisation in the peripheral 14‐membered π‐electron system. The symmetry of the MO's occupied by the unpaired electron in the two cases suggests that the central «butane» unit acts as an electron releasing group in the radical cation and as an electron accepting group in the radical anion.