Synthese, Struktur und spektroskopische Eigenschaften von [FeIII(tnpa)(OH)(PhCOO)]ClO4: ein Modellkomplex für die aktive Form von Sojabohnen-Lipoxygenase-1

Individual molecules can be stretched with a scanning force microscope and the forces required to rupture bonds and to mechanically drive their structures towards new conformations and states can be measured. The tailoring of the experiments, the possibility of carrying them out in quasi-equilibrium conditions, the relationships between single molecule force measurements, and macroscopic kinetics or thermodynamic data are discussed. Mechanochemical experiments are expanding chemistry into new realms between biology and material science.

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The Coordination Chemistry of FeCl₃ and FeCl₂ to Bis[2‐(2,3‐dihydroxyphenyl)‐6‐pyridylmethyl](2‐pyridylmethyl)amine: Access to a Diiron(III) Compound with an Unusual Pentagonal‐Bipyramidal/Square‐Pyramidal Environment

Machkour

Thallaj

Benhamou

et al. 2006

Chemistry A European J

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Coordination of FeCl3 to the title ligand yields a mononuclear iron(III) complex 1, which was characterized by spectroscopic techniques and X-ray diffraction. The ligand is (kappa3-N) tridentate and the metal, which lies in a pseudo-octahedral environment, is bound to a phenolate group from the catechol substituent. The dichloroiron(II) complex 2 was easily obtained by metalation of the ligand with FeCl2 and characterized by various spectroscopic techniques. In their cyclic voltammograms both 1 and 2 display the same reversible FeII/FeIII wave at E1/2=10 mV (vs. SCE). Reduction of compound 1 with Zn/Hg yields 2', which displays identical properties to 2. Taken together, these findings indicate that in spite of the different oxidation state of the metal in 2, no major geometrical/structural change is observed at the metal center with respect to 1. The reaction of 2 with dioxygen in the absence of organic substrates proceeds extremely rapidly and yields compound 3, which is a diiron(III) derivative whose X-ray crystal structure is also reported. The possibility of a radical-based mechanism is discussed. Compound 3 displays an unusual geometry: one iron(III) center is seven-coordinate, whereas the other lies in a square-pyramidal environment. The two iron atoms are bridged by the catecholato substituents. To the best of our knowledge, 3 is the first example of a seven-coordinate iron(III) derivative with tris(2-pyridylmethyl)amine ligands.

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Synthese, Struktur und spektroskopische Eigenschaften von [FeIII(tnpa)(OH)(PhCOO)]ClO4: ein Modellkomplex für die aktive Form von Sojabohnen-Lipoxygenase-1

Cited by 6 publications

References 24 publications

Stretching Single Molecules Along Unbinding and Unfolding Pathways with the Scanning Force Microscope

Stretching Single Molecules Along Unbinding and Unfolding Pathways with the Scanning Force Microscope

Stretching Single Molecules Along Unbinding and Unfolding Pathways with the Scanning Force Microscope

The Coordination Chemistry of FeCl₃ and FeCl₂ to Bis[2‐(2,3‐dihydroxyphenyl)‐6‐pyridylmethyl](2‐pyridylmethyl)amine: Access to a Diiron(III) Compound with an Unusual Pentagonal‐Bipyramidal/Square‐Pyramidal Environment

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Synthese, Struktur und spektroskopische Eigenschaften von [FeIII(tnpa)(OH)(PhCOO)]ClO4: ein Modellkomplex für die aktive Form von Sojabohnen-Lipoxygenase-1

Cited by 6 publications

References 24 publications

Stretching Single Molecules Along Unbinding and Unfolding Pathways with the Scanning Force Microscope

Stretching Single Molecules Along Unbinding and Unfolding Pathways with the Scanning Force Microscope

Stretching Single Molecules Along Unbinding and Unfolding Pathways with the Scanning Force Microscope

The Coordination Chemistry of FeCl3 and FeCl2 to Bis[2‐(2,3‐dihydroxyphenyl)‐6‐pyridylmethyl](2‐pyridylmethyl)amine: Access to a Diiron(III) Compound with an Unusual Pentagonal‐Bipyramidal/Square‐Pyramidal Environment

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Product

Resources

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The Coordination Chemistry of FeCl₃ and FeCl₂ to Bis[2‐(2,3‐dihydroxyphenyl)‐6‐pyridylmethyl](2‐pyridylmethyl)amine: Access to a Diiron(III) Compound with an Unusual Pentagonal‐Bipyramidal/Square‐Pyramidal Environment