von Rekowski, Felicitas and Gschwind, Ruth M. (2014) Polynuclear Phosphoramidite Copper Complexes with Mixed Trigonal/Tetrahedral Coordination in THF. ORGANOMETALLICS, 33 (21). pp. 6259-6262. ISSN 0276-7333, 1520-6041
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In the field of asymmetric copper-catalyzed 1,4-addition reactions new applications were established using triorganoaluminum reagents in etheral solvents. This raised the question of whether phosphoramidite copper complexes have similar structures and aggregation levels in THF compared to noncoordinating solvents such as CD2Cl2. Therefore, NMR spectroscopic investigations of the precatalytic structure of phosphoramidite copper complexes in THF-d8 were performed. Combined low-temperature studies, spectra simulations, and a detailed integral analysis indicated [(CuIL)(CuIL2)(4)] as precatalyst in THF. This confirms the mixed trigonal/tetrahedral coordination of the copper atoms in phosphoramidite copper complexes as a more general motif. In addition, highly aggregated complexes might be more probable than expected even in THF.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CATALYZED CONJUGATE ADDITION; REAGENTS; CONSTRUCTION; LIGANDS; NMR; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. Ruth Gschwind |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Aug 2019 13:35 |
| Last Modified: | 07 Aug 2019 13:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9213 |
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