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Structure and magnetic properties of copper(II) carboxylate with pyridyl-substituted nitronyl nitroxides
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lin, Hsin-Huang Wei, Ho-Hsiang Lee, Gene-Hsiang Wang, Y. S. |
| Copyright Year | 2001 |
| Abstract | Abstract The synthesis, crystal structure and magnetic properties of four new copper(II) carboxylate complexes with pyridyl-substituted nitronyl nitroxides, [Cu2(μ-ClCH2CO2)2(ClCH2CO2)2(NITpPy)2(H2O)2]CH3OH (1), [Cu(Cl2CHCO2)2(NITpPy)2(H2O)] (2), [Cu(Cl3CCO2)2(NITpPy)2(H2O)] (3) and [Cu(Cl2CHCO2)2(NITmPy)2(H2O)2] (4) (NITpPy=4,4,5,5-tetramethyl-2-(4-pyridyl)-2-imidazoline-N1-oxy N3-oxide, NITmPy=4,4,5,5-tetramethyl-2-(3-pyridyl)-2-imidazoline-N1-oxy N3-oxide) are reported. Complex 1 has a dimeric structure where two copper ions are doubly bridged by four oxygen atoms from two μ-ClCH2CO2 − ions. Complexes 2 and 3 are mononuclear, the copper(II) ion has five coordination with square-pyramidal symmetry. In complex 4, the copper(II) ion has distorted-octahedral six coordination. Temperature dependence studies of the χmT values of complexes 1–4 revealed that 1 exhibits a strong intramolecular metal–metal antiferromagnetic interaction and a weak intramolecular metal–nitroxide antiferromagnetic coupling, 2 and 3 exhibit a weak intramolecular metal–nitroxide antiferromagnetic coupling, while 4 possesses weak ferromagnetic exchange interactions between metal and NITmPy. A simple spin polarization model has been used to justify the observed magnetic exchange interactions between Cu(II) and radical ligands. |
| Starting Page | 3057 |
| Ending Page | 3063 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| Volume Number | 20 |
| Alternate Webpage(s) | http://ntur.lib.ntu.edu.tw//bitstream/246246/169390/1/115.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/S0277-5387%2801%2900917-2 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
