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Subsite‐Specific Reactions of a Cyclotriveratrylene [4Fe‐4S] Cluster Complex
Author(s) -
Van Strijdonck Gino P. F.,
Ten Have Petrus T. J. H.,
Peiters Martinus C.,
Van Der Lindenm Johannes G. M.,
Steggerda Jan J.,
Nolte Roeland J. M.
Publication year - 1997
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19971300819
Subject(s) - chemistry , substituent , redox , stereochemistry , ligand (biochemistry) , cluster (spacecraft) , denticity , crystallography , crystal structure , inorganic chemistry , receptor , biochemistry , computer science , programming language
Ligand exchange reactions are carried out exclusively at the unique iron site of a subsite‐differentiated cyclotriveratrylene [4Fe‐4S] cluster complex. The effect of a variety of thiolate, phenolate, bidentate, and bridging ligands on the redox potential of the subsite‐differentiated [4Fe‐4S] cluster complex is studied and compared with the effects of such ligands on an [Fe 4 S 4 C 14 ] 2 ‐ cluster. The redox potential can be modulated within the range of −1.60 to −1.80 V (vs. Fc 0/+ ) by varying the ligand. The introduction of an electron releasing substituent shifts the redox potential to more negative values, whereas an electron withdrawing substituent has the opposite effect. A linear relationship exists between the number of substituted sites and the reduction potential of the cluster.