Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202300193
Keywords
Schiff bases; XRD; ketone-amine-alkyne coupling reaction; Density Functional Theory
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Two new Zn(II) complexes with tridentate hydrazone-based ligands were synthesized and characterized. These complexes exhibited good catalytic activity in the KA(2) coupling reaction, leading to the synthesis of compounds with unique applications. DFT calculations successfully explained the correlation between the electronic structure of the complexes and their catalytic reactivity.
Two new Zn(II) complexes bearing tridentate hydrazone-based ligands with NNO or NNS donor atoms were synthesised and characterised by elemental analysis, infrared (IR) and nuclear magnetic resonance (NMR) spectroscopies, and single crystal X-ray diffraction methods. These complexes, together with four previously synthesised analogues, having hydrazone ligands with a NNO donor set of atoms, were successfully employed as catalysts in the ketone-amine-alkyne (KA(2)) coupling reaction, furnishing tetrasubstituted propargylamines, compounds with unique applications in organic chemistry. DFT calculations at the CAM-B3LYP/TZP level of theory were performed to elucidate the electronic structure of the investigated Zn(II) complexes, excellently correlating the structure of the complexes to their catalytic reactivity.
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