Abstract
147 The interaction of transition metal ions with organic ligands that form stable paramagnetic species upon complexation has attracted much attention of coordination chemists. A typical specific feature of complexes with redox-active ligands is that organic moieties are more involved in chemical and physical transformation than the central metal atom. This study deals with complexes with oquinoid ligands—4,6-di -tert -butylN (2,6-diisoPropylphenyl)oiminobenzosemiquinone ( 1 L ISQ ), oiminothiobenzosemiquinone ( 2 L ISQ ), 3,6-ditert -butylosemiquinone ( 3 L SQ ), and 3,4,5,6-tetrachloroobenzosemiquinone ( 4 L SQ )—containing different heteroatoms in the five-membered chelate ring (Scheme 1).
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