Correlating Structure and KA 2 Catalytic Activity of Zn II Hydrazone Complexes

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 fo...

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Published in:European journal of inorganic chemistry 2023-11, Vol.26 (33)
Main Authors: Adejumo, Temiloluwa T., Danopoulou, Marianna, Zorba, Leandros P., Pevec, Andrej, Zlatar, Matija, Radanović, Dušanka, Savić, Milica, Gruden, Maja, Anđelković, Katarina K., Turel, Iztok, Čobeljić, Božidar, Vougioukalakis, Georgios C.
Format: Article
Language:English
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Summary: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.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.202300193