SBAUER PROPERTIE s OF SYNTHETIC ANALOGS OF ACTIVE SITES OF THE IRON-SULFUR PROTEINS

Synthetic analogs of the active sites of iron-sulfur proteins. 8. Some electronic properties of (Fe4S4(SR)4)3-, analogs of reduced bacterial ferredoxins.

One-electron reduction of the synthetic tetramers [FemSa(SR)~] 2(R CHgPh, Ph), by chemical and electrochemical methods affords the corres~ofiding-trianions. ~The collective results from optical, electron paramagnetic resonance, and M~ssbauer spectroscopy, when compared to available data for reduced 4-Fe and 8-Fe ferredoxi~ proteins and super-reduced Chromatium high-potential protein, reveal tha...

Iron–Sulfur Models of Protein Active Sites

Iron–sulfur clusters appear in a great many proteins as both electron-transport and enzymatic sites (see Iron–Sulfur Proteins); for this reason there has been great interest for 30 years in the development and understanding of iron–sulfur model complexes. Both structure and properties of synthetic analogs of 1-, 2-, 3-, and 4-iron protein active sites have been studied extensively.1 This articl...

Synthetic analogs of active sites of iron-sulfur proteins: bis (o-xylyldithiolato) ferrate (III) monoanion, a structurally unconstrained model for the rubredoxin Fe-S4 unit.

To complete the set of synthetic analogs of the three recognized types of active sites in iron-sulfur redox proteins, the compound (Et4N)[Fe((SCH2)2C6H4)2], derived from o-xylyl-alpha,alpha'-dithiol, has been prepared and its structure has been determined by x-ray diffraction. The bischelate anion contains a near-tetrahedral Fe(III)-S4 coordination unit with small rhombic distortions and all Fe...

Synthetic analogs of the active sites of iron-sulfur proteins. Structure and properties of bis(o-xylyldithiolato-m2-sulfidoferrate (3)), an analog of the 2Fe-2S proteins.

The synthetic analog approach has been applied to a clarification of the active sites of 2Fe-2S(*) proteins. The compound (Et(4)N)(2)[FeS(SCH(2))(2)C(6)H(4)](2), derived from o-xylyl-alpha,alpha'-dithiol, has been prepared and its structure has been determined by x-ray diffraction. The centrosymmetric anion contains two tetrahedrally coordinated ferric ions bridged by two sulfide ions and separ...

Synthetic analogues of the active sites of iron-sulfur proteins.