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Triplet States in Organic Chemistry
Author(s) -
Kurreck Harry
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.199314091
Subject(s) - unpaired electron , triplet state , excited state , chemistry , molecule , organic molecules , electron , multiplicity (mathematics) , chemical physics , ground state , spin (aerodynamics) , photochemistry , computational chemistry , atomic physics , physics , quantum mechanics , organic chemistry , mathematical analysis , mathematics , thermodynamics
The investigation of organic multispin systems —with the triplet state as the initial member—has contributed considerably to the understanding of chemical bonding and to the examination of quantum mechanical model concepts. Structural information is accessible from the form and strength of the interaction between unpaired electrons in triplet ground states; in photochemistry triplet excited states play an important role both from a mechanistic and a preparative point of view. Besides triplet states, spin states of higher multiplicity (that is, molecules with more than two unpaired electrons) are attracting increasing interest. One way to superparamagnetic organic molecules has been shown by the synthesis of a branched nonacarbene with 18 unpaired electrons ( S = 9 state).