Synthetic analogs of the active sites of iron-sulfur proteins. VI. Spectral and redox characteristics of the tetranuclear clusters [Fe4S4 (SR) 4] 2

BV DePamphilis, BA Averill, T Herskovitz…

Index: DePamphilis,B.V. et al. Journal of the American Chemical Society, 1974 , vol. 96, p. 4159 - 4167

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Citation Number: 189

Abstract

Abstract: The electronic spectra (250-700 nm) and redox properties of a series of tetrameric complexes [Fe4S4-(SR), 12-(R= alkyl, aryl, Ac-Cys-NHMe) have been examined in nonaqueous and aqueous DMSO solutions.[Fe4S4 (S-Cys (Ac) NHMe) 4] 2-and [Fe4Sq (SC6H4NMe3) 4] 2+ were generated in solution by ligand substitution reactions of the free thiols and [FeaS@-t-Bu) 4] 2-. Alkyl-substituted tetramers possess two principal absorption ...