Spitzer, Fabian and Balazs, Gabor and Grassl, Christian and Keilwerth, Martin and Meyer, Karsten and Scheer, Manfred (2018) The Influence of beta-diiminato Ligands on As-4 Activation by Cobalt Complexes. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 57 (28). pp. 8760-8764. ISSN 1433-7851, 1521-3773
Full text not available from this repository. (Request a copy)Abstract
In a systematic study of the activation of As-4, three [LCo(tol)] (L=beta-diiminato) complexes have revealed different steric and electronic influences. 2,6-Diisopropylphenyl (Dipp) and 2,6-dimethylphenyl (dmp) flanking groups were used, one of the ligands with H backbone substituents (beta-dialdiminate L-0) and two with Me substituents (beta-diketiminates L-3 and L-1). In the reaction with As-4, different dinuclear products [(LCo)(2)As-4] (LM=L-0 (1), L-1 (2), L-3 (3)) were isolated, with all showing differently shaped [Co2As4] cores in the solid state: octahedral in 1, prismatic in 2, and asterane-like in 3. Thermal treatment of 3 leads to the abstraction of one arsenic atom to yield [((LCo)-Co-3)(2)As-3] (4). All products were comprehensively characterized by single-crystal X-ray diffraction, FD-MS, and (HNMR)-H-1 spectroscopy. A rational explanation for the different reactivity is also proposed and DFT calculations shed light on the nature of the highly flexible [Co2As4] cores.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MAIN-GROUP; ELECTRON-DIFFRACTION; P-4 TRANSFORMATIONS; PHOSPHORUS; ELEMENTS; POLYARSENIDES; REACTIVITY; REDUCTION; COMPOUND; ANTIMONY; beta-diiminato ligand; paramagnetic compounds; small-molecule activation; substituent effects; yellow arsenic |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Feb 2020 12:05 |
| Last Modified: | 13 Feb 2020 12:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14245 |
Actions (login required)
 |
View Item |
