Stereochemistry of Octahedral cis-Tetrafluoro Titanium Complexes with Ph2P(O)CH(Me)CH2C(O)Et Enantiomers in CH2Cl2
| Autor: | I. B. Goryunova, E. I. Goryunov, A. S. Parshakov, V. I. Privalov, E. E. Nifant'ev, E. G. Il’in |
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| Rok vydání: | 2019 |
| Předmět: |
Coordination sphere
Denticity Chemistry Ligand General Chemical Engineering General Chemistry Fluorine-19 NMR Nuclear magnetic resonance spectroscopy 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences 0104 chemical sciences Crystallography Asymmetric carbon Racemic mixture Enantiomer |
| Zdroj: | Russian Journal of Coordination Chemistry. 45:667-674 |
| ISSN: | 1608-3318 1070-3284 |
| Popis: | The complex formation of TiF4 with the phosphorylated ketone Ph2P(O)CH(Me)CH2C(O)Et (L), containing an asymmetric carbon atom in the aliphatic hydrocarbon group and representing a racemic mixture of enantiomers, was studied by 19F{1H} and 31P{1H} NMR spectroscopy. The composition of complexes formed in the solution was determined; analysis of the 19F NMR spectra resorting to the heterotropicity concept was used to assign the resonance lines to two chiral optically active racemic and meso-stereoisomers of cis-TiF4L2. The configurations of enantiomers of the monodentate ligand coexisting in the coordination sphere were found to have a crucial effect on the axial fluorine atoms of mixed octahedral cis-tetrafluoro d0 transition metal complexes. A new efficient method was developed for the synthesis of ligand L. |
| Databáze: | OpenAIRE |
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