An investigation of two copper(ii) complexes with a triazole derivative as a ligand: magnetic and catalytic properties

Abstract

Two copper(ii) complexes were investigated as catalysts for selective oxidation of styrene to benzaldehyde and of cyclohexane to KA oil.

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

“…When compared with related copper(II) complexes reported in the literature, similar Cu−O and Cu−N bond distances around the copper(II) are observed [64,65] . Nevertheless, the axial bond distance [2.301(7) Å] which is considerably larger, is typical for Cu−O complexes with water molecules and comparable to the distances found for analogous copper( II ) complexes [66,67] . Two chelate rings, one five‐membered and another six‐membered, detected in 1 are substantially non‐planar.…”

“…[64,65] Nevertheless, the axial bond distance [2.301( 7) Å] which is considerably larger, is typical for CuÀ O complexes with water molecules and comparable to the distances found for analogous copper(II) complexes. [66,67] Two chelate rings, one five-membered and another six-membered, detected in interaction. [68] As displayed in Figure 2, the packing diagram of ChemistrySelect 1 exhibits strong hydrogen bonding interactions involving the carboxylate and coordinated/uncoordinated water molecules.…”

Synthesis and crystal structure of hydrated μ-oxalato-bis{bis[3-methyl-5-(pyridin-2-yl)-1H-1,2,4-triazole]iron(II)} bis(toluenesulfonate) 2.75-hydrate

“…A search for the structures of coordination compounds based on 3-methyl-5-(pyrid-2-yl)-2H-1,2,4-triazole revealed ten hits. Three of these structures represent our previous studies: CAMSUI (Zakharchenko, Khomenko, Doroschuk, Raspertova, Shova et al, 2021), IXIBID and IXIBOJ (Petrenko et al, 2021). The other structures correspond to mixed-ligand complexes with various metals, among them: NIYRAQ (Cao et al, 2014), QURBIQ (Guetlich & Schollmeyer, 2015), REWSOC (Cheng et al, 2007), SARQIO (Muller et al, 2013) and VESZOI (Buchanan et al, 1990).…”

“…The study of coordination compounds based on substituted 1,2,4-triazoles and 3d and 4d transition metals allows the design of supramolecular structures that can find applications in various fields such as molecular magnetism, catalysis, electrochemistry or cluster engineering (Zhang et al, 2017;Zakharchenko et al, 2019;Chen et al, 2015;Petrenko et al, 2020Petrenko et al, , 2021. The presence of the pyridine ring in such triazole systems leads to the formation of interesting isolated metalorganic frameworks that demonstrate promising magnetic properties, making them suitable for application as moleculebased magnets (Yao et al, 2015;Han et al, 2017;Li et al, 2015;Huang et al, 2015).…”

Novel Copper(II) Complexes with Dipinodiazafluorene Ligands: Synthesis, Structure, Magnetic and Catalytic Properties

“…On the other hand, it is well known that many complexes of transition and non-transition metals [70][71][72][73] catalyze oxidation reactions with peroxides (H 2 O 2 ; tert-butyl hydroperoxide), and the use of N-donor chelating ligands in many cases leads to an increase in catalytic activity [74]. In particular, copper complexes with N-donor ligands belong to the effective catalysts for the oxidation of organic compounds [75][76][77][78][79]. In this work, we report on the complexing properties of chiral derivatives of dipinodiazafluorene with respect to copper(II) halides, the preparation of four new copper(II) complexes, and their catalytic activity in the oxidation of alkanes and alcohols with hydrogen peroxide and tert-butyl hydroperoxide.…”