Spin crossover of ferric complexes with catecholate derivatives.Single-crystal X-ray structure,Magnetic and Mossbauer investigations

摘要

The properties of ferric catecholate systems were extensively investigated as they provide interesting functional models of the intradiol catechol dioxygenases.These enzymes operate in the sequence of chemical reactions necessary for the degradation of aromatic compounds,one key step consisting in the intradiol cleavage of the catecholate groups in the presence of dioxygene.It is well established that the activity for intradiol catechol cleavage depends on the iron-catecholate interaction,i.e.increases with the semiquinonato character of the dioxolene ligand and the Lewis acidity of the Fe~(III)ion.