Wiegel, Anne-Kathrin and Rad, Babak Rezaei and Herrmann, Dirk and Wolf, Robert (2015) Synthesis and Characterization of Tetra(pyridyl)cyclobutadiene Iron Complexes [Cp*Fe(C(4)py(4))](-) (py=3-pyridyl and 4-pyridyl, Cp* = C5Me5). ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 641 (12-13). pp. 2065-2070. ISSN 0044-2313, 1521-3749
Full text not available from this repository. (Request a copy)Abstract
The tetra(pyridyl)cyclobutadiene complexes [K([18{crown-6){Cp*FeC4(3-py)(4)}] (2) (3-py = 3-pyridyl) and [K([18{crown-6){Cp*FeC4(4-py)(4)}] (3) (4-py = 4-pyridyl) were synthesized by reacting two equivalents of bis(3-pyridyl)acetylene and bis(4-pyridyl)acetylene with the naphthalene complex [K([18{crown-6){Cp*Fe((4)-C10H8)}]. Compounds 2 and 3 were fully characterized by X-ray crystallography, H-1 and C-13{H-1} NMR spectroscopy, UV/Vis spectroscopy, and elemental analysis. They display similar sandwich structures with an (5)-coordinated Cp* unit and an (4)-coordinated cyclobutadiene moiety. In the solid state, compounds 2 and 3 form distinct polymeric chain structures due to the interaction of the pyridyl nitrogen atoms with the potassium cations. Cyclic voltammetry measurements indicate that the [Cp*FeC(4)py(4)](-) anions (py = 3-py or 4-py) undergo a reversible one electron oxidation to neutral [Cp*FeC(4)py(4)] complexes. A second quasi-reversible redox event is attributed to the oxidation these products to unstable [Cp*FeC(4)py(4)](+) cations. The properties of 2 and 3 are compared with those of the previously reported 2-pyridyl complex [K([18{crown-6){Cp*FeC4(2-py)(4)}] (1) [Dalton Trans. 2014, 43, 4247-4250].
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | METALLOLIGAND; CAGE; Sandwich complexes; Iron; Supramolecular compounds |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Robert Wolf |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Jun 2019 09:59 |
| Last Modified: | 06 Jun 2019 09:59 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4713 |
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