Siemeling, Ulrich and Faerber, Christian and Leibold, Michael and Bruhn, Clemens and Muecke, Philipp and Winter, Rainer F. and Sarkar, Biprajit and von Hopffgarten, Moritz and Frenking, Gernot (2009) Six-Membered N-Heterocyclic Carbenes with a 1,1 '-Ferrocenediyl Backbone: Bulky Ligands with Strong Electron-Donor Capacity and Unusual Non-Innocent Character. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (31). pp. 4607-4612. ISSN 1434-1948,
Full text not available from this repository.Abstract
The stable, crystalline N-heterocyclic diaminocarbene fc[N(CH(2)tBu)-C-N(CH(2)tBu)] (2d, fc = 1,1'-ferrocenediyl) was prepared by deprotonation of its formamidinium precursor fc[N(CH(2)tBu)-CH-N(CH(2)tBu)][BF(4)] (1d) and used for the preparation of the 16 valence electron complexes [Mo(2d)-(CO)(4)], [RhCl(2d)(cod)] (cod = 1,5-cyclooctadiene) and [RhCl(2d)(CO)(2)], 1d, 2d and [RhCl(2d)(cod)] were structurally characterised by single-crystal X-ray diffraction studies. The electrochemical properties of 2d, its 2-adamantyl analogue 2c, its complex [RhCl(2d)(CO)(2)] and of the precursors 1d and 1,1'-bis(neopentylamino)ferrocene were investigated by electrochemistry. The carbenes are easily oxidised to the corresponding radical cation, whose persistent nature is unprecedented in the chemistry of N-heterocychc carbenes. The spin density is located at the Fe atom and the carbene C atom according to the results of EPR spectroscopic studies and DFT calculations. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSITION-METAL-COMPLEXES; POLYMERIZATION CATALYSTS; COORDINATION CHEMISTRY; ASYMMETRIC CATALYSIS; RADICAL COMPLEXES; STABLE CARBENES; REDOX; MOLYBDENUM; ANION; ORGANOCATALYSIS; Carbenes; N-Heterocyclic carbenes; Radicals; Density-functional calculation; Ligand effects; Redox chemistry; Sandwich complexes |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Arbeitskreis Prof. Dr. Rainer Winter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Sep 2020 08:34 |
| Last Modified: | 02 Sep 2020 08:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28181 |
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