Influence of the counterion on the geometry of Cu(I) and Cu(II) complexes with 1,10-phenanthroline

Crispini, Alessandra; Cretu, Carmen; Aparaschivei, Diana; Andelescu, Adelina A.; Sasca, Viorel; Badea, Valentin; Aiello, Iolinda; Szerb, Elisabeta I.; Costişor, Otilia

doi:10.1016/j.ica.2017.05.064

Cited by 17 publications

(10 citation statements)

References 54 publications

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“…The axial CueN distance is quite longer than the equatorial ones (1.996(3), 2.015(2) and 2.017(2) Å). The elongation of the apical bond length in complex 1 is of comparable magnitude to that observed in the previously reported square pyramidal complexes [5,18]. The N2BeCueN1A angle is 176.64 (10) .…”

Section: Resultssupporting

confidence: 84%

“…Transition metal сomplexes containing phenanthroline (Phen) have been interesting for their applicability in catalysis [1], medicinal chemistry [2], photoelectronic and magnetic materials [3]. Attached to metal ions, the Phen ligands favor the intermolecular pep stacking interactions with other aromatic molecules or ions, such as barbituric acids [4], which can play an important role in sustaining supramolecular solid-state architectures [5]. Barbituric (H 2 ba) and 2-thiobarbituric (H 2 tba) acids (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Two new Cu(II) and Ni(II) 1,10-phenanthroline complexes with anions of barbituric acids in the outer sphere: Synthesis, structure, spectroscopic, magnetic and thermal properties

Головнев

Мolokeev

Sterkhova

et al. 2020

Journal of Molecular Structure

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Two new complexes [Cu(Phen) 2 (H 2 O)](Hba) 2 •3H 2 O (1) and [Ni(Phen) 3 ](Htba) 2 ]•Phen•2H 2 O (2) (Phen ¼ 1,10-phenanthroline, Hba À ¼ barbiturate ion, Htba À ¼ thiobarbiturate ion) have been synthesized and characterized by elemental analysis, single-crystal and powder XRD, magnetic measurements, TG-DSC, FT-IR, and Vis absorption spectra. Complex 1 shows a distorted square pyramidal geometry around the copper (II) metal center. The coordination around the Ni atom is a distorted octahedron NiN 6 . The 3D and 2D supramolecular structures of 1 and 2 are formed respectively by intermolecular H-bonds. Two NeH/O hydrogen bonds in 1, and NeH/O, NeH/S hydrogen bonds in 2 form infinite chains. As a result of pep interactions, similar 4-membered zigzag chains in structures 1 and 2 respectively are formed.

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Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Two new Cu(II) and Ni(II) 1,10-phenanthroline complexes with anions of barbituric acids in the outer sphere: Synthesis, structure, spectroscopic, magnetic and thermal properties

Головнев

Мolokeev

Sterkhova

et al. 2020

Journal of Molecular Structure

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“…as promising antitumor activity [7], anticancer [8], antifungal, antibacterial [9], antioxidant [10], antimycoplasmal activity [11] as well as coordination polymers, corrosion inhibitors, optical materials and solar cell dyes [10]. Numerous metal complexes with 2,9-dimethyl-1,10-phenanthroline as a ligand or mixed with other ligands were reported [12][13][14][15]. As a continuation of research in this area, we report herein the synthesis, characterization and biological study of mixed ligand complexes with bis(2,4,4-trimethylpentyl)dithiophosphinic acid and 2,9-dimethyl-1,10phenanthroline.…”

Section: Introductionmentioning

confidence: 99%

Spectral and Biological Studies on New Mixed Ligand Complexes

Pal¹,

Alam²,

Hossen³

et al. 2018

J. Sci. Res.

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In this study, new mixed ligand complexes have been prepared from bis(2,4,4-trimethylpentyl)dithiophosphinic acid (C16H35PS2) and 2,9-dimethyl-1,10-phenanthroline (C14H12N2) with various metal(II) ions. The molecular formula of the metal complexes were [Mn(C16H34PS2)(C14H12N2)]Cl (1), [Fe(C16H34PS2)(C14H12N2)]Cl (2), [Co(C16H34PS2) (C14H12N2)]Cl (3), [Zn(C16H34PS2)(C14H12N2)]Cl (4) and [Cd(C16H34PS2)(C14H12N2)]Cl (5). These complexes have been characterized by various physico-chemical techniques such as melting point, molar conductance, magnetic susceptibility measurements as well as UV-Vis, IR, TG and mass spectroscopic analyses. The surface morphology was determined by scanning electron microscope (SEM). The magnetic moment value, color as well as spectral measurements suggested that the geometrical structures of the metal complexes were tetrahedral. The spectral data showed that bis(2,4,4-trimethylpentyl)dithiophosphinic acid and 2,9-dimethyl-1,10-phenanthroline ligands acted as uninegative and neutral bidentate ligand, respectively. The obtained mixed ligand complexes were more stable in air and highly soluble in common organic solvent. The bio-efficacy of ligands and metal complexes have been screened against the test microorganism using agar disc diffusion method. The complex 4 showed potential antibacterial activity against Sterptococcus aureus as compared to standard drug, imipenem. On the other hand, the complex 3 also displayed more potent antifungal activity against Lecanicillium fungicola. Moreover, the complex 3 was also found to have better scavenging activity against 2,2-diphenyl-1-picrylhydrazyl.

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“… 21 These redox potentials should be sensitive to the geometry of the complex through simple td ligand modifications and through the exchange of the Cl – anions. 73 , 74 , 97 Such modifications will lead to new catalysts, 98 light-harvesting complexes, 99 , 100 and magnetically switchable materials 21 taking advantage of the versatile and unique structural and redox properties of dioxothiadiazole molecules. Research in this vein is currently being pursued in our laboratory.…”

Section: Discussionmentioning

confidence: 99%

Influence of the Increasing Number of Organic Radicals on the Structural, Magnetic, and Electrochemical Properties of the Copper(II)–Dioxothiadiazole Family of Complexes

Arczyński

Pinkowicz

2020

Inorg. Chem.

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The preparation, structures, and electrochemical and magnetic properties supported by density functional theory (DFT) calculations of three new copper(II) compounds with [1,2,5]thiadiazolo[3,4- f ][1,10]phenanthroline 1,1-dioxide (td) and its radical anion (td ·– ) are reported: {[Cu II Cl(td)](μ-Cl) 2 [Cu II Cl(td)]} ( 1 ), which incorporates only neutral td ligands; [Cu II Cl(td ·– )(td)]·2MeCN ( 2 ), which comprises one neutral td and one radical td ·– ; and PPN[Cu II Cl(td ·– ) 2 ]·2DMA ( 3 ), where Cu II ions are coordinated by two radical anions td ·– (DMA, dimethylacetamide; PPN + , the bis(triphenylphosphine)iminium cation). All three compounds show interesting paramagnetic behavior with low-temperature features indicating significant antiferromagnetic coupling. The magnetic properties of 1 are dominated by Cu II ···Cu II interactions ( J CuCu ) mediated through the Cl – bridges, while the magnetic properties of 2 and 3 are governed mainly by the td ·– ···td ·– ( J tdtd ) and Cu II –td ·– ( J Cutd ) exchange interactions. The structure of 2 features only two major magnetic coupling pathways enabling the fitting of experimental data with J tdtd = −36.0(5) cm –1 and J Cutd = −12.6(2) cm –1 only. Compound 3 exhibits a complex network of magnetic contacts. Attempt to approximate its magnetic behavior using only a local magnetic contacts model resulted in J tdtd = −5.6(1) cm –1 and two J Cutd constants, −12.4(2) and −22.6(4) cm –1 . The experimental fitting is critically compared with the results of broken symmetry density functional theory (BS DFT) calculations for inter- and intramolecular contacts. More consistent results were obtained with the M06 functional as opposed to popular B3LYP, which encountered problems reproducing some of the experimental intermolecular exchange interactions. Electrochemical measurements of 2 and 3 in MeCN showed three reversible nearly overlapping redox peaks appearing in a narrow potential range of −600 to −100 mV vs Fc/Fc ...

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Influence of the counterion on the geometry of Cu(I) and Cu(II) complexes with 1,10-phenanthroline

Cited by 17 publications

References 54 publications

Two new Cu(II) and Ni(II) 1,10-phenanthroline complexes with anions of barbituric acids in the outer sphere: Synthesis, structure, spectroscopic, magnetic and thermal properties

Two new Cu(II) and Ni(II) 1,10-phenanthroline complexes with anions of barbituric acids in the outer sphere: Synthesis, structure, spectroscopic, magnetic and thermal properties

Spectral and Biological Studies on New Mixed Ligand Complexes

Influence of the Increasing Number of Organic Radicals on the Structural, Magnetic, and Electrochemical Properties of the Copper(II)–Dioxothiadiazole Family of Complexes

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