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 language | English |
|---|---|
| Pages (from-to) | 3484-3490 |
| Number of pages | 7 |
| Journal | European Journal of Inorganic Chemistry |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2010 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Inorganic Chemistry
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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 journal › Article
TY - JOUR
T1 - 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
T2 - Synthesis, crystal structure, and magnetic properties
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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UR - http://www.scopus.com/inward/citedby.url?scp=77955400082&partnerID=8YFLogxK
U2 - 10.1002/ejic.201000095
DO - 10.1002/ejic.201000095
M3 - Article
AN - SCOPUS:77955400082
SP - 3484
EP - 3490
JO - Chemische Berichte
JF - Chemische Berichte
SN - 0009-2940
IS - 22
ER -