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Substituent Effects on the Zero‐Field Splitting Parameters of Localized Triplet, 1,3‐Cyclopentanediyl Biradicals
Author(s) -
Adam Waldemar,
Fröhlich Lothar,
Nau Werner M.,
Korth HansGent,
Sustmann Reiner
Publication year - 1993
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199313391
Subject(s) - spins , zero field splitting , zero (linguistics) , electron paramagnetic resonance , reactivity (psychology) , substituent , cube (algebra) , inverse , field (mathematics) , zero point energy , chemistry , physics , condensed matter physics , molecular physics , computational chemistry , nuclear magnetic resonance , quantum mechanics , mathematics , stereochemistry , electron , geometry , spin polarization , medicine , linguistics , philosophy , alternative medicine , pathology , pure mathematics
Information about the reactivity of the corresponding monoradicals is provided by the D parameters of the biradicals 1 . The zero‐field splitting parameter D , which can be obtained from the EPR spectrum of a localized triplet biradical, increases with the inverse cube of the average distance between the unpaired spins. For para ‐substituted, bisbenzylic triplet 1,3‐cyclopentanediyls 1 , the D parameter varies measurably depending on the substituents X.