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Valence Tautomerism in a o ‐Benzoquinone Adduct of a Tetraazamacrocycle Complex of Manganese
Author(s) -
Caneschi Andrea,
Dei Andrea
Publication year - 1998
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19981116)37:21<3005::aid-anie3005>3.0.co;2-2
Subject(s) - tautomer , valence (chemistry) , adduct , manganese , chemistry , benzoquinone , 1,4 benzoquinone , photochemistry , medicinal chemistry , stereochemistry , quinone , organic chemistry
Two different charge distributions of the complex cation [Mn III (cth)(diox)] + (cth=a tetraazamacrocycle, diox=3,5‐di‐ tert ‐butyl‐ o ‐benzoquinone; structure shown in the picture) can be isolated by varying the counteranion: [Mn III (cth)(cat)]BPh 4 and [Mn II (cth)(sq)]ClO 4 (cat and sq denote the catecholato and semiquinonato forms of the ligand). The complex undergoes noncooperative entropy‐driven valence tautomeric transitions.