| Autor: |
Aguilera, Tania, Pastrán, Jesús, Llovera, Ligia, Linden, Anthony, Herrera, Alberto, Venuti, Doménico, Agrifoglio, Giuseppe, Dorta, Romano |
| Předmět: |
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| Zdroj: |
Zeitschrift für Anorganische und Allgemeine Chemie; 10/16/2023, Vol. 649 Issue 20, p1-10, 10p |
| Abstrakt: |
Dioxomolybdenum(VI) complexes (1‐6) were prepared in good yields (≥79 %) using enantiopure C2 and C1‐symmetric bidentate N,N‐ligands (L1‐L6) derived from (+)‐camphor. The ligands and complexes were characterized by NMR spectroscopy, IR, and elemental analysis. Single crystal X‐ray diffraction analyses of complexes 3, 4 and 6 confirmed the bidentate coordination modes of ligands L3, L4, and L6 and revealed distorted octahedral coordination geometries around the metal center. Complexes 3 and 6 form conformational isomers depending on the orientation of the substituents of the ligand aryl groups. Preliminary evaluation of the complexes as catalysts for the epoxidation of cyclohexene (81–93 % conversion) and cis‐cyclooctene (66–94 % conversion) with cumyl hydroperoxide and 35 % w/w aqueous hydrogen peroxide (39–73 %) demonstrated their activity for oxygen atom transfer reactions, opening the way for asymmetric epoxidations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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