Fine-tuning of the properties of supported hydrogenation catalysts based on furoate Cu(II) complexes with aminopyridines as precursors.

Authors

Kseniya A Koshenskova, Dmitry V Novikov, Lada S Razvorotneva, Fedor M Dolgushin, Anastasia V Lagutina, Alexandr O Panov, Evgeny V Shishkin, Denis N Nebykov, Natalia V Gogoleva, Maria A Teplonogova, Ivan A Buldashov, Ivan V Ananyev, Anna S Zaeva, Igor L Eremenko, Irina A Lutsenko

Published in

Dalton transactions (Cambridge, England : 2003). Jul 14, 2026. Epub Jul 14, 2026.

Abstract

The creation of the "correct" surface in heterogeneous catalysis is an important condition for the optimal operation of a number of catalytic systems, for example, hydrogenation (nitrobenzene dicyclopentadiene). In this case, the interaction of the metal with the support plays a decisive role in the catalytic efficiency of the process. In the present work, a series of copper(II) complexes of the composition [Cu(fur)₂(ampy)₂]·L were synthesized, where fur^- represents the anions 2Hfur (1 and 2) and 3Hfur (3 and 4); ampy = γ-aminopyridine (γ-ampy; 1 and 4) and α-aminopyridine (α-ampy; 2 and 3); and L = CH₃CN (1). The crystalline products were isolated, and their structures were determined using the single-crystal X-ray diffraction method. According to X-ray data, it was established that the complexes with γ-ampy (1 and 4) are characterized by the formation of trans-isomers, whereas for α-ampy, the cis-configuration of the ligands is realized - the position of the amino groups in the α-ampy ligands is the main factor stabilizing the cis-structure of complexes 2 and 3. STA data of 1-4 revealed the volatility of trans-4, which has a smaller number of intermolecular hydrogen bonds, and quantum chemical calculations indicated high stability (-152.3 kcal mol^-1). Crystallographic and geometric characteristics of trans-complexes 1 and 4 determined the formation of effective precatalytic surfaces (SEM data), allowing the hydrogenation of nitrobenzene (NB) and dicyclopentadiene (DCPD) to be carried out most efficiently under atmospheric pressure and low temperatures - the aniline yield was about 100%.

PMID:
42444419
Bibliographic data and abstract were imported from PubMed on 14 Jul 2026.

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