Saalfrank, R. W. and Scheurer, A. and Reimann, U. and Hampel, F. and Trieflinger, Christian and Bueschel, Michael and Daub, Joerg and Trautwein, A. X. and Schunemann, V. and Coropceanu, V. (2005) Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters - Mossbauer studies on internal electron-exchange processes. CHEMISTRY-A EUROPEAN JOURNAL, 11 (20). pp. 5843-5848. ISSN 0947-6539,
Full text not available from this repository. (Request a copy)Abstract
In a one-pot reaction of N(5-methylthiazole-2-yl)-thiazole-2-carb- oxamide HL2 (3) with iron(ii) acetate in air, the homotrinuclear heteroleptic mixed-valent oxo-centered iron cluster [(FeFe2O)-Fe-II-O-III(L-2)(3)(OAc)(3)] (4) was formed. Exchange of iron(ii) in 4 by nickel(ii) afforded the heteronuclear cluster [(NiFe2O)-Fe-II-O-III(L-2)(3)(OAc)(3)] (6). crystals suitable for X-ray structure analyses, in 4 and 6, the OAc- co-ligands were exchanged by OBz(-) ligands to give [(FeFe2O)-Fe-II-O-III(L-2)(3)(OBz)(3)] (5) and [(NiFe2O)-Fe-II-O-III(L-2)(3)(OBz)(3)] (7). The complexes 5 and 7 are isostructural and made up of three ditopic, tridentate ligands (L-2)(-) and three bridging ben-zoate co-ligands, which fix the three metal ions in the corners of a triangle with an mu(3)-O2- ion in the center. The mixed-valent character of 4-7, their intramolecular electron-exchange processes, and their redox properties were studied by variable-temperature Mossbauer spectroscopy and cyclic voltammetry.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | IRON COMPLEX; TRINUCLEAR; CHEMISTRY; CONSTRUCTION; SPECTROSCOPY; LIGANDS; UNITS; CORE; electron exchange; iron; mixed valence; Moessbauer spectroscopy; trinuclear |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Alumni or Retired Professors > Prof. Dr. Jörg Daub |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Apr 2021 06:31 |
| Last Modified: | 26 Apr 2021 06:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/35533 |
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