Brunner, Henri and Cattey, Helene and Meier, Walter and Mugnier, Yves and Stueckl, A. Claudia and Wachter, Joachim and Wanninger, Robert and Zabel, Manfred (2003) Preparative and electrochemical investigations on the electron sponge behavior of cobalt telluride clusters: CO substitution in [Co11Te7(CO)(10)](n-) ions (n=1, 2) by PMe2Ph and crystal structure of [Co11Te7(CO)(5)(PMe2Ph)(5)]. CHEMISTRY-A EUROPEAN JOURNAL, 9 (16). pp. 3796-3802. ISSN 0947-6539
Full text not available from this repository.Abstract
The reaction of the cluster salts [Cp-2*Nb(CO)(2)](n)[Co11Te7(CO)(10)] (CP* = C5Me5; n = 1, 2) with excess PMe2Ph gave the neutral, dark brown clusters [Co11Te7(CO)(6)(PMe2Ph)(4)] (5) and [Co11Te7(CO)(5)(PMe2Ph)(5)] (6) with 147 metal valence electrons. The new compounds were characterized by IR spectroscopy, elemental analyses, and mass spectrometry. The molecular structure of 6 was determined by X-ray crystallography. Like its precursor anion, it consists of a pentagonal-prismatic [Co11Te7] core, but with a ligand sphere composed of five CO and five PMe2Ph ligands. Detailed electrochemical studies of both reactions reveal that a stepwise substitution of CO ligands in the initial cluster anions takes place leading to intermediate [CO11Te7(CO)(10-m)(PMe2Ph)(m)](n-) ions (m = 1-5; n = 1, 2). Each of these intermediates is distinguished by at least one oxidation and two reduction waves, giving rise to a total of 21 redox couples and 27 electroactive species. The electron sponge character of the new compounds is particularly pronounced in 5, which exhibits charges n between +1 and -4 corresponding to metal valence electron counts of between 146 and 151.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COMPLEXES; REACTIVITY; CARBONYL; LIGANDS; ANIONS; UNITS; carbonyl ligands; cluster compounds; cobalt; electrochemistry; tellurium |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Arbeitskreis Dr. Joachim Wachter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Aug 2021 11:48 |
| Last Modified: | 04 Aug 2021 11:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38720 |
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