A μ 3-alkoxo-bridged tetranuclear [Cu 4L 2] copper(II) complex of a hexadentate N2O4 donor ligand with a [6 + 0] Cu4O4 cubane core: Synthesis, crystal structure, and magnetic properties

Dipankar Maity, Atish D. Jana, Mainak Debnath, Nigel G.R. Hearns, Ming Han Sie, Hon Man Lee, Rodolphe Clérac, Mahammad Ali

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A novel hexacoordinating non-Schiff base ligand (H 4L) with N 2O 4 donor atoms has been synthesized by simple Mannich reactions. The use of this ligand with Cu(ClO 4) 2* 6H 2O in different molar ratios as well as pH leads to the formation of a mononuclear species and a tetranuclear CuII complex possessing a cubane [Cu 4L 2] core with almost equal Cu...Cu separation. In the presence of an excess amount of copper(II) ions and triethylamine at reflux, the mononuclear [CuH 2L] species can be converted into the tetranuclear one, whereas the reverse process was not observed even after prolonged reaction time. Both the complexes have been characterized by single-crystal X-ray diffraction and magnetic measurements. Magnetic studies reveal that complex 1 displays a paramagnetic Curie-type behavior whereas 2 displays a singletspin ground state induced by strong intramolecular antiferromagnetic interactions.

Original languageEnglish
Pages (from-to)3484-3490
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number22
DOIs
Publication statusPublished - 2010 Jan 1

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Copper
Magnetic properties
Crystal structure
Ligands
Magnetic variables measurement
Ground state
Display devices
Single crystals
Ions
X ray diffraction
Atoms
triethylamine

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

Cite this

Maity, Dipankar ; Jana, Atish D. ; Debnath, Mainak ; Hearns, Nigel G.R. ; Sie, Ming Han ; Lee, Hon Man ; Clérac, Rodolphe ; Ali, Mahammad. / A μ 3-alkoxo-bridged tetranuclear [Cu 4L 2] copper(II) complex of a hexadentate N2O4 donor ligand with a [6 + 0] Cu4O4 cubane core : Synthesis, crystal structure, and magnetic properties. In: European Journal of Inorganic Chemistry. 2010 ; No. 22. pp. 3484-3490.
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abstract = "A novel hexacoordinating non-Schiff base ligand (H 4L) with N 2O 4 donor atoms has been synthesized by simple Mannich reactions. The use of this ligand with Cu(ClO 4) 2* 6H 2O in different molar ratios as well as pH leads to the formation of a mononuclear species and a tetranuclear CuII complex possessing a cubane [Cu 4L 2] core with almost equal Cu...Cu separation. In the presence of an excess amount of copper(II) ions and triethylamine at reflux, the mononuclear [CuH 2L] species can be converted into the tetranuclear one, whereas the reverse process was not observed even after prolonged reaction time. Both the complexes have been characterized by single-crystal X-ray diffraction and magnetic measurements. Magnetic studies reveal that complex 1 displays a paramagnetic Curie-type behavior whereas 2 displays a singletspin ground state induced by strong intramolecular antiferromagnetic interactions.",
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A μ 3-alkoxo-bridged tetranuclear [Cu 4L 2] copper(II) complex of a hexadentate N2O4 donor ligand with a [6 + 0] Cu4O4 cubane core : Synthesis, crystal structure, and magnetic properties. / Maity, Dipankar; Jana, Atish D.; Debnath, Mainak; Hearns, Nigel G.R.; Sie, Ming Han; Lee, Hon Man; Clérac, Rodolphe; Ali, Mahammad.

In: European Journal of Inorganic Chemistry, No. 22, 01.01.2010, p. 3484-3490.

Research output: Contribution to journalArticle

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AU - Maity, Dipankar

AU - Jana, Atish D.

AU - Debnath, Mainak

AU - Hearns, Nigel G.R.

AU - Sie, Ming Han

AU - Lee, Hon Man

AU - Clérac, Rodolphe

AU - Ali, Mahammad

PY - 2010/1/1

Y1 - 2010/1/1

N2 - A novel hexacoordinating non-Schiff base ligand (H 4L) with N 2O 4 donor atoms has been synthesized by simple Mannich reactions. The use of this ligand with Cu(ClO 4) 2* 6H 2O in different molar ratios as well as pH leads to the formation of a mononuclear species and a tetranuclear CuII complex possessing a cubane [Cu 4L 2] core with almost equal Cu...Cu separation. In the presence of an excess amount of copper(II) ions and triethylamine at reflux, the mononuclear [CuH 2L] species can be converted into the tetranuclear one, whereas the reverse process was not observed even after prolonged reaction time. Both the complexes have been characterized by single-crystal X-ray diffraction and magnetic measurements. Magnetic studies reveal that complex 1 displays a paramagnetic Curie-type behavior whereas 2 displays a singletspin ground state induced by strong intramolecular antiferromagnetic interactions.

AB - A novel hexacoordinating non-Schiff base ligand (H 4L) with N 2O 4 donor atoms has been synthesized by simple Mannich reactions. The use of this ligand with Cu(ClO 4) 2* 6H 2O in different molar ratios as well as pH leads to the formation of a mononuclear species and a tetranuclear CuII complex possessing a cubane [Cu 4L 2] core with almost equal Cu...Cu separation. In the presence of an excess amount of copper(II) ions and triethylamine at reflux, the mononuclear [CuH 2L] species can be converted into the tetranuclear one, whereas the reverse process was not observed even after prolonged reaction time. Both the complexes have been characterized by single-crystal X-ray diffraction and magnetic measurements. Magnetic studies reveal that complex 1 displays a paramagnetic Curie-type behavior whereas 2 displays a singletspin ground state induced by strong intramolecular antiferromagnetic interactions.

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