Crystal structure, spectroscopy and ferromagnetostructural behavior of the complex [Cu<sup>II</sup>(L)(Cl)(L′)]·H<inf>2</inf>O (L = 2-aminomethylbenzimidazole, L′= L-isoleucinate)

Griselda Carpinteyro-López, José Luis Alcántara-Flores, Daniel Ramírez-Rosales, Roberto Escudero, Blanca M. Cabrera-Vivas, Sylvain Bernès, Rafael Zamorano-Ulloa, Yasmi Reyes-Ortega

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3 Citations (Scopus)

Abstract

[CuII(L)(Cl)(L′)]·H2O 1 (L = 2-aminomethylbenzimidazole, L′ = L-isoleucinate) compound crystallizes in the orthorhombic space group P212121. A short Cu - O...Cu contact is observed between neighboring molecules in the crystal structure, with a O...Cu separation of 4.214(3) Å. Molecular structure of 1 shows that L and L′ act as bidentate ligands, forming the base of the square pyramidal geometry environment of the CuII ion, while the chloro is the fifth apical ligand. UV/VIS spectrum of 1 shows d-d transitions with λmax = 603 nm, characteristic of a low symmetry. Far IR spectrum shows νCu-N at 493, 404 cm-1, νCu-O at 446 cm-1, and at 302 cm-1 νCu-Cl. ESR X-band of polycrystalline 1 at 77, 300 K show axial spectra with the ratio A77/A300 = 4.51, and a linewidth increase by 14.5 % on going from 300 K to 77 K, suggesting a incipient ferromagnetic exchange interaction. ESR axial spectrum of 1 in solution shows abundant hfs and shfc interactions. Susceptibility vs Temperature data measured from 2-300 K range, show that the magnetic ordering may be due to Cu ions linking by oxygen bridges given place to a weak ferromagnetic interaction. The very weak exchange interaction, J = 0.103 cm-1, is in agreement with the ESR spectra results and with a CuII - O...CuII direct interaction. ©ARKAT USA, Inc.
Original languageAmerican English
Pages (from-to)31-42
Number of pages26
JournalArkivoc
StatePublished - 1 Jan 2008
Externally publishedYes

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Paramagnetic resonance
Crystal structure
Exchange interactions
Spectroscopy
Ions
Ligands
Linewidth
Molecular structure
Magnetization
Oxygen
Molecules
Geometry
Temperature

Cite this

Carpinteyro-López, Griselda ; Alcántara-Flores, José Luis ; Ramírez-Rosales, Daniel ; Escudero, Roberto ; Cabrera-Vivas, Blanca M. ; Bernès, Sylvain ; Zamorano-Ulloa, Rafael ; Reyes-Ortega, Yasmi. / Crystal structure, spectroscopy and ferromagnetostructural behavior of the complex [Cu<sup>II</sup>(L)(Cl)(L′)]·H<inf>2</inf>O (L = 2-aminomethylbenzimidazole, L′= L-isoleucinate). In: Arkivoc. 2008 ; pp. 31-42.
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title = "Crystal structure, spectroscopy and ferromagnetostructural behavior of the complex [CuII(L)(Cl)(L′)]·H2O (L = 2-aminomethylbenzimidazole, L′= L-isoleucinate)",
abstract = "[CuII(L)(Cl)(L′)]·H2O 1 (L = 2-aminomethylbenzimidazole, L′ = L-isoleucinate) compound crystallizes in the orthorhombic space group P212121. A short Cu - O...Cu contact is observed between neighboring molecules in the crystal structure, with a O...Cu separation of 4.214(3) {\AA}. Molecular structure of 1 shows that L and L′ act as bidentate ligands, forming the base of the square pyramidal geometry environment of the CuII ion, while the chloro is the fifth apical ligand. UV/VIS spectrum of 1 shows d-d transitions with λmax = 603 nm, characteristic of a low symmetry. Far IR spectrum shows νCu-N at 493, 404 cm-1, νCu-O at 446 cm-1, and at 302 cm-1 νCu-Cl. ESR X-band of polycrystalline 1 at 77, 300 K show axial spectra with the ratio A77/A300 = 4.51, and a linewidth increase by 14.5 {\%} on going from 300 K to 77 K, suggesting a incipient ferromagnetic exchange interaction. ESR axial spectrum of 1 in solution shows abundant hfs and shfc interactions. Susceptibility vs Temperature data measured from 2-300 K range, show that the magnetic ordering may be due to Cu ions linking by oxygen bridges given place to a weak ferromagnetic interaction. The very weak exchange interaction, J = 0.103 cm-1, is in agreement with the ESR spectra results and with a CuII - O...CuII direct interaction. {\circledC}ARKAT USA, Inc.",
author = "Griselda Carpinteyro-L{\'o}pez and Alc{\'a}ntara-Flores, {Jos{\'e} Luis} and Daniel Ram{\'i}rez-Rosales and Roberto Escudero and Cabrera-Vivas, {Blanca M.} and Sylvain Bern{\`e}s and Rafael Zamorano-Ulloa and Yasmi Reyes-Ortega",
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Crystal structure, spectroscopy and ferromagnetostructural behavior of the complex [Cu<sup>II</sup>(L)(Cl)(L′)]·H<inf>2</inf>O (L = 2-aminomethylbenzimidazole, L′= L-isoleucinate). / Carpinteyro-López, Griselda; Alcántara-Flores, José Luis; Ramírez-Rosales, Daniel; Escudero, Roberto; Cabrera-Vivas, Blanca M.; Bernès, Sylvain; Zamorano-Ulloa, Rafael; Reyes-Ortega, Yasmi.

In: Arkivoc, 01.01.2008, p. 31-42.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Crystal structure, spectroscopy and ferromagnetostructural behavior of the complex [CuII(L)(Cl)(L′)]·H2O (L = 2-aminomethylbenzimidazole, L′= L-isoleucinate)

AU - Carpinteyro-López, Griselda

AU - Alcántara-Flores, José Luis

AU - Ramírez-Rosales, Daniel

AU - Escudero, Roberto

AU - Cabrera-Vivas, Blanca M.

AU - Bernès, Sylvain

AU - Zamorano-Ulloa, Rafael

AU - Reyes-Ortega, Yasmi

PY - 2008/1/1

Y1 - 2008/1/1

N2 - [CuII(L)(Cl)(L′)]·H2O 1 (L = 2-aminomethylbenzimidazole, L′ = L-isoleucinate) compound crystallizes in the orthorhombic space group P212121. A short Cu - O...Cu contact is observed between neighboring molecules in the crystal structure, with a O...Cu separation of 4.214(3) Å. Molecular structure of 1 shows that L and L′ act as bidentate ligands, forming the base of the square pyramidal geometry environment of the CuII ion, while the chloro is the fifth apical ligand. UV/VIS spectrum of 1 shows d-d transitions with λmax = 603 nm, characteristic of a low symmetry. Far IR spectrum shows νCu-N at 493, 404 cm-1, νCu-O at 446 cm-1, and at 302 cm-1 νCu-Cl. ESR X-band of polycrystalline 1 at 77, 300 K show axial spectra with the ratio A77/A300 = 4.51, and a linewidth increase by 14.5 % on going from 300 K to 77 K, suggesting a incipient ferromagnetic exchange interaction. ESR axial spectrum of 1 in solution shows abundant hfs and shfc interactions. Susceptibility vs Temperature data measured from 2-300 K range, show that the magnetic ordering may be due to Cu ions linking by oxygen bridges given place to a weak ferromagnetic interaction. The very weak exchange interaction, J = 0.103 cm-1, is in agreement with the ESR spectra results and with a CuII - O...CuII direct interaction. ©ARKAT USA, Inc.

AB - [CuII(L)(Cl)(L′)]·H2O 1 (L = 2-aminomethylbenzimidazole, L′ = L-isoleucinate) compound crystallizes in the orthorhombic space group P212121. A short Cu - O...Cu contact is observed between neighboring molecules in the crystal structure, with a O...Cu separation of 4.214(3) Å. Molecular structure of 1 shows that L and L′ act as bidentate ligands, forming the base of the square pyramidal geometry environment of the CuII ion, while the chloro is the fifth apical ligand. UV/VIS spectrum of 1 shows d-d transitions with λmax = 603 nm, characteristic of a low symmetry. Far IR spectrum shows νCu-N at 493, 404 cm-1, νCu-O at 446 cm-1, and at 302 cm-1 νCu-Cl. ESR X-band of polycrystalline 1 at 77, 300 K show axial spectra with the ratio A77/A300 = 4.51, and a linewidth increase by 14.5 % on going from 300 K to 77 K, suggesting a incipient ferromagnetic exchange interaction. ESR axial spectrum of 1 in solution shows abundant hfs and shfc interactions. Susceptibility vs Temperature data measured from 2-300 K range, show that the magnetic ordering may be due to Cu ions linking by oxygen bridges given place to a weak ferromagnetic interaction. The very weak exchange interaction, J = 0.103 cm-1, is in agreement with the ESR spectra results and with a CuII - O...CuII direct interaction. ©ARKAT USA, Inc.

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