Novel Copper(II) Complexes with BIAN Ligands: Synthesis, Structure and Catalytic Properties of the Oxidation of Isopropylbenzene | Sciact - CRIS-system of Boreskov Institute of Catalysis

Novel Copper(II) Complexes with BIAN Ligands: Synthesis, Structure and Catalytic Properties of the Oxidation of Isopropylbenzene Full article

Journal

Catalysts
ISSN: 2073-4344

Output data

Year: 2023, Volume: 13, Article number : 849, Pages count : 16 DOI: 10.3390/catal13050849

Tags

copper complexes; BIAN ligands; redox-active ligands; oxidation; isopropylbenzene

Authors

Fomenko Iakov S. ¹ , Koshcheeva Olga S. ¹ , Kuznetsova Nina I. ² , Larina Tatyana V ² , Gongola Marko I. ³ , Afewerki Medhanie ³ , Abramov Pavel A. ¹ , Novikov Alexander S. ^4,5 , Gushchin Artem L. ¹

Affiliations

1	Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia
2	Federal Research Center Boreskov Institute of Catalysis, 5 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia
3	Novosibirsk State University, 1 Pirogova Str., Novosibirsk 630090, Russia
4	Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russia
5	Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow 117198, Russia

Funding (1)

Russian Science Foundation

22-23-20123 (122032300137-0)

Two new isomeric complexes [CuBr2(R-bian)] (R = 4-Me-Ph (1), 2-Me-Ph (2)) were obtained by reacting copper(II) bromide with 1,2-bis[(2-methylphenyl)imino]acenaphthene ligands and characterized. The crystal structure of 2 was determined by X-ray diffraction analysis. The copper atom has a distorted square-planar environment; the ω angle between the CuN2 and CuBr2 planes is 37.004°. The calculated ω parameters for optimized structures 1 and 2 were 76.002° and 43.949°, indicating significant deviations from the ideal tetrahedral and square-plane geometries, respectively. Molecules 2 form dimers due to non-covalent Cu···Br contacts, which were analyzed by DFT calculations. The complexes were also characterized by cyclic voltammetry and UV-Vis spectroscopy. A quasi-reversible Cu(II)/Cu(I) redox event with E1/2 potentials of 0.81 and 0.66 V (vs. SHE) was found for 1 and 2, respectively. The electronic absorption spectra showed the presence of Cu(I) species as a result of the partial reduction of the complexes in the acetonitrile solution. Both complexes were tested as homogenous catalysts for the oxidation of isopropylbenzene (IPB) in acetonitrile at low temperatures. Differences in the mechanism of the catalytic reaction and the composition of the reaction products depending on the oxidizing ability of the catalyst were revealed

Fomenko I.S. , Koshcheeva O.S. , Kuznetsova N.I. , Larina T.V. , Gongola M.I. , Afewerki M. , Abramov P.A. , Novikov A.S. , Gushchin A.L.
Novel Copper(II) Complexes with BIAN Ligands: Synthesis, Structure and Catalytic Properties of the Oxidation of Isopropylbenzene
Catalysts. 2023. V.13. 849 :1-16. DOI: 10.3390/catal13050849 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Apr 18, 2023
Accepted:	May 4, 2023
Published print:	May 8, 2023
Published online:	May 8, 2023

Web of science:	WOS:000997220300001
Scopus:	2-s2.0-85160782541
Elibrary:	55988553
Chemical Abstracts:	2023:1134796
OpenAlex:	W4382292761

DB	Citing
Scopus	11
OpenAlex	12
Elibrary	7
Web of science	10