Synthesis, spectroscopic and X-ray structural characterization of ternary complexes of copper(II) and 2,5-dimethoxycinnamic acid with phenanthrolines

Battaglia, L. P.; Corradi, A. Bonamartini; Zoroddu, Maria Antonietta; Manca, G; Basosi, Riccardo; Solinas, Costantino

doi:10.1039/dt9910002109

Cited by 11 publications

(2 citation statements)

References 10 publications

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“…The pattern g // > g ⊥ > 2 observed in table 1 for both compounds is consistent with the geometry of the copper ion sites suggesting a d(x 2 -y 2 ) ground orbital state, 43 as observed for other ternary compounds contaning copper and phenanthroline or other aromatic ligands. 21,44,45 Following ideas described previously, 46 the eigenvalues of the crystal g 2 matrices were used to obtain the molecular g-values for sites A and B and the angle between their apical directions, which are included in table 1. together with the crystallographic angles.…”

Section: Single Crystal Epr Spectramentioning

confidence: 99%

Electron paramagnetic resonance study of ternary CuII compounds with glycine and phenanthroline

et al. 2014

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We report here electron paramagnetic resonance (EPR) measurements at 9 and 34 GHz, and room temperature (T), in powder and single crystal samples of the ternary compounds of copper nitrate or copper chloride with glycine and 1,10-phenanthroline [Cu(Gly)(phen)(H 2 O)]•NO 3 •1.5H 2 O (1) and [Cu(Gly)(phen)Cl] 2 •7H 2 O (2). In compound 1, the copper ions are arranged in 1-D chains along one of the crystal axes connected by syn-anti carboxylate ligands, while in 2 the array is nearly 3-D and the connections involve H-bonds and stacking interactions. The angular variation of the squared g-factor and the line width were measured as a function of orientation of the magnetic field (B 0) in three orthogonal crystal planes. In both compounds we observed one resonance without hyperfine structure for any magnetic field orientation which we attribute to the collapse of the hyperfine coupling and of the resonances of two chemically identical but rotated coppers in the unit cell, produced by exchange interactions. We analyse the results in terms of the structures of the compounds and chemical paths connecting neighbour copper ions which support the exchange interactions between neighbour spins in the lattice. Considering the collapse of the EPR signals of rotated sites in the lattices we are able to set lower limits to the exchange interactions, which are supported by weak equatorialapical carboxylate bridges in 1, and by paths containing hydrogen bonds and aromatic π-π interactions in 2. Broadening due to dipole-dipole couplings and hyperfine interactions are strongly reduced by these exchange couplings and their role in the EPR line width is more difficult to recognize.

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Section: Single Crystal Epr Spectramentioning

confidence: 99%

Electron paramagnetic resonance study of ternary CuII compounds with glycine and phenanthroline

et al. 2014

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“…A survey of the Cambridge Structural Database (CSD, version 5.43; update of June 2022; Groom et al, 2016) revealed that crystal structures had been reported for complexes of 3-methoxy cinnamic acid derivatives and a number of metal ions, including copper (Drew et al, 1994), cadmium (Zhang et al, 2013), tin (Su et al, 2022), cerium, neodymium, europium, gadolinium (Khalfaoui et al, 2017(Khalfaoui et al, , 2021 and dysprosium (Khalfaoui et al, 2018(Khalfaoui et al, , 2017. Only one complex based on copper and 2,5-dimethoxycinnamic acid with 2,9-dimethyl-1,l0-phenanthroline has been reported (Battaglia et al, 1991). However, no complexes containing only the cobalt ion and 3-methoxy cinnamic acid associated with 1,10-phenanthroline have been documented in the CSD.…”

Section: Database Surveymentioning

confidence: 99%

Synthesis, crystal structure and Hirshfeld surface analysis of aqua(3-methoxycinnamato-κO)bis(1,10-phenanthroline-κ² N,N′)cobalt(II) nitrate

Lehleh¹,

Boutebdja²,

Beghidja³

et al. 2022

Acta Cryst E

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The title compound, [Co(C10H9O3)(C12H8N2)2(H2O)]NO3 (I), crystallizes in the triclinic space group P\overline{1} with a monomeric [Co(3-meo-cin)(phen)2(H2O)]+ cation and a nitrate anion (3-meo-cin = 3-methoxy cinnamic acid) in the asymmetric unit. The CoII ion is coordinated by four N atoms from two 1,10-phenanthroline ligands and two O atoms, the first from a methoxy cinnamate ligand and the second from a coordinated water molecule, forming a distorted octahedral geometry. Discrete entities of the cation and nitrate anion are formed by water–nitrate O—H...O and phen–nitrate C—H...O hydrogen bonds. The components are further assembled into chains along the c-axis direction. Layers are than formed by slipped π–π stacking interactions parallel to the bc plane. The intermolecular interactions in the crystal structure were quantified and analysed using Hirshfeld surface analysis.

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Synthesis and spectroscopic characterization of ternary complexes of copper(II) glycylglycine and substituted phenanthrolines

Zoroddu

Gladiali

Marchettini

et al. 1995

Transition Met Chem

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Complexes of Cu(glygly)phen {glygly =glycylglycine; phen=4,7-dimethyl [(1)], 5,6-dimethyl [(2)], 5-NO2[(3)], 5-Cl[(4)], 2-oxazolinyl (2-ox) [(5)] phenanthroline} and bis(2-oxazolinylphenanthroline)copper(II) [(6)] were synthesized and characterized by conductivity measurements, e.p.r., i.r. and reflectance electronic spectroscopies. A broad u.v.-vis. band in the 620-640 nm range and a shoulder at ca. 825 nm suggest that these complexes are five-coordinate. The e.p.r. spectra indicate a stronger equatorial ligand field in the ternary complexes which is absent in the binary Cu-phen complexes, suggesting square pyramidal coordination, whose base contains the three donor atoms from glygly (O, N, N) and one donor from the phenanthroline nitrogen atom. The other nitrogen-containing ligand of the phenanthroline is in an apical position. The spectroscopic results can be correlated with electronic and steric effects attributable to the different substituents on the phenanthroline ligands. Only small variations in the structure of the ternary complexes occur as a function of the electronic effects of substituents on the aromatic phenanthroline ring ligands. Steric hindrance predominates in determining coordination geometry around copper(II)

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Synthesis, spectroscopic and X-ray structural characterization of ternary complexes of copper(II) and 2,5-dimethoxycinnamic acid with phenanthrolines

Cited by 11 publications

References 10 publications

Electron paramagnetic resonance study of ternary CuII compounds with glycine and phenanthroline

Electron paramagnetic resonance study of ternary CuII compounds with glycine and phenanthroline

Synthesis, crystal structure and Hirshfeld surface analysis of aqua(3-methoxycinnamato-κO)bis(1,10-phenanthroline-κ² N,N′)cobalt(II) nitrate

Synthesis and spectroscopic characterization of ternary complexes of copper(II) glycylglycine and substituted phenanthrolines

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Synthesis, spectroscopic and X-ray structural characterization of ternary complexes of copper(II) and 2,5-dimethoxycinnamic acid with phenanthrolines

Cited by 11 publications

References 10 publications

Electron paramagnetic resonance study of ternary CuII compounds with glycine and phenanthroline

Electron paramagnetic resonance study of ternary CuII compounds with glycine and phenanthroline

Synthesis, crystal structure and Hirshfeld surface analysis of aqua(3-methoxycinnamato-κO)bis(1,10-phenanthroline-κ2 N,N′)cobalt(II) nitrate

Synthesis and spectroscopic characterization of ternary complexes of copper(II) glycylglycine and substituted phenanthrolines

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Synthesis, crystal structure and Hirshfeld surface analysis of aqua(3-methoxycinnamato-κO)bis(1,10-phenanthroline-κ² N,N′)cobalt(II) nitrate