Two new nitronyl nitroxide Cu(II) complexes {[Cu(hfac)<sub>2</sub>]<sub>2</sub>(NIT-4PyPh)}<sub>2</sub>(<strong>1</strong>) and [Cu(hfac)<sub>2</sub>][(NIT-3...Two new nitronyl nitroxide Cu(II) complexes {[Cu(hfac)<sub>2</sub>]<sub>2</sub>(NIT-4PyPh)}<sub>2</sub>(<strong>1</strong>) and [Cu(hfac)<sub>2</sub>][(NIT-3PyPh)<sub>2</sub>](<strong>2</strong>)(NIT-4PyPh=2-[4-(4-pyridinylmethoxy) phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide,NIT-3PyPh=2-[4-(3-pyridinylmethoxy)phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide,hfac=hexafluoroacetylacetone), have been synthesized and characterized. The X-ray crystal structure analyses show that structures of the two complexes are different. Complex <strong>1</strong> crystallizes in cyclic metal-radical dimer consisting of four Cu(hfac)<sub>2</sub> and two NIT-4PyPh ligands;four Cu(II) atoms adopt two coordinated modes. In the ring, each Cu(II) ion is hexa-coordinated by four oxygen atoms of two hfac ligands and one oxygen atom (ONCNO) and one nitrogen atom of the pyridinyl group from two different radicals. Outside the ring, each Cu(II) is penta-coordinated by four oxygen atoms of two hfac ligands and one oxygen atom (ONCNO) from the radical ligand. Complex <strong>2</strong> crystallizes in discrete molecule, while the Cu(II) atom is hexa-coordinated by four oxygen atoms of two hfac molecules and two nitrogen atoms of the pyridinyl group from two radical ligands.展开更多
Two new M(II)-radical complexes [M(hfac)<sub>2</sub>(IM-<span style="font-size:10.0pt;font-family:;" "=""><i></i></span><i>o<span style="font-...Two new M(II)-radical complexes [M(hfac)<sub>2</sub>(IM-<span style="font-size:10.0pt;font-family:;" "=""><i></i></span><i>o<span style="font-size:10.0pt;font-family:;" "=""></span></i>-QN)] (M = Ni(<strong>1</strong>), Zn(<strong>2</strong>);IM-<span style="white-space:normal;font-size:10pt;font-family:;" "=""><i></i></span><i><span style="white-space:normal;">o</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""></span></i>-QN = 4'-quinoxalinyl-substituted imino nitroxide;<span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>hfac<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = hexafluoroa-cetylacetonate) have been synthesized and characterized by X-ray diffraction analysis, element analyses, IR and UV-Visible spectroscopy. X-ray analysis reveal that the structures of both complexes are similar configuration and differently spatial symmetries. The complex <strong>1</strong> crystallizes in the triclinic <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>P<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i>ī space group with the respective cell parameters: <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>a<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 9.1189(18) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">Å</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>b<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 9.836(2) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;展开更多
Using two new flexible and functional nitronyl nitroxide radicals as ligands, two copper (II) complexes {[Cu(hfac)<sub>2</sub>]<sub>3</sub>(NITmPhO3Py)<sub>2</sub>}<sub>n...Using two new flexible and functional nitronyl nitroxide radicals as ligands, two copper (II) complexes {[Cu(hfac)<sub>2</sub>]<sub>3</sub>(NITmPhO3Py)<sub>2</sub>}<sub>n</sub> (1) and [Cu(hfac)<sub>2</sub><sub> </sub>(NIToPhO3Py)]<sub>2</sub> (2) (NITmPhO3Py = 2-[(3-methoxy-pyridinyl)phen-3-yl]- 4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, NIToPhO3Py = 2-[(3-methoxy-pyridinyl)phen-2-ly]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, hfac = hexafluoroacetylacetone), have been characterized structurally and magnetically. The X-ray crystal analyses showed that complex 1 displayed a chain polymer structure which formed with {[Cu(hfac)<sub>2</sub>]<sub>3</sub>(NITmPhO3Py)<sub>2</sub>}<sub>n</sub> due to the cross-linking of two cyclic binuclear fragments {[Cu(hfac)<sub>2</sub>]<sub>2</sub>(NITmPhO3- Py)<sub>2</sub>} via the bridging unit [Cu(hfac)<sub>2</sub>];complex 2 presented a binuclear cyclic structure [Cu(hfac)<sub>2</sub>]<sub>2</sub>(NIToPhO3Py)<sub>2</sub>. The magnetic behaviors of the two complexes 1 and 2 have been investigated. Magnetic studies showed that antiferromagnetic interactions dominated in complex 1, while there existed ferromagnetic interactions between Cu(II) and coordinated NO group in complex 2.展开更多
文摘Two new nitronyl nitroxide Cu(II) complexes {[Cu(hfac)<sub>2</sub>]<sub>2</sub>(NIT-4PyPh)}<sub>2</sub>(<strong>1</strong>) and [Cu(hfac)<sub>2</sub>][(NIT-3PyPh)<sub>2</sub>](<strong>2</strong>)(NIT-4PyPh=2-[4-(4-pyridinylmethoxy) phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide,NIT-3PyPh=2-[4-(3-pyridinylmethoxy)phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide,hfac=hexafluoroacetylacetone), have been synthesized and characterized. The X-ray crystal structure analyses show that structures of the two complexes are different. Complex <strong>1</strong> crystallizes in cyclic metal-radical dimer consisting of four Cu(hfac)<sub>2</sub> and two NIT-4PyPh ligands;four Cu(II) atoms adopt two coordinated modes. In the ring, each Cu(II) ion is hexa-coordinated by four oxygen atoms of two hfac ligands and one oxygen atom (ONCNO) and one nitrogen atom of the pyridinyl group from two different radicals. Outside the ring, each Cu(II) is penta-coordinated by four oxygen atoms of two hfac ligands and one oxygen atom (ONCNO) from the radical ligand. Complex <strong>2</strong> crystallizes in discrete molecule, while the Cu(II) atom is hexa-coordinated by four oxygen atoms of two hfac molecules and two nitrogen atoms of the pyridinyl group from two radical ligands.
文摘Two new M(II)-radical complexes [M(hfac)<sub>2</sub>(IM-<span style="font-size:10.0pt;font-family:;" "=""><i></i></span><i>o<span style="font-size:10.0pt;font-family:;" "=""></span></i>-QN)] (M = Ni(<strong>1</strong>), Zn(<strong>2</strong>);IM-<span style="white-space:normal;font-size:10pt;font-family:;" "=""><i></i></span><i><span style="white-space:normal;">o</span><span style="white-space:normal;font-size:10pt;font-family:;" "=""></span></i>-QN = 4'-quinoxalinyl-substituted imino nitroxide;<span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>hfac<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = hexafluoroa-cetylacetonate) have been synthesized and characterized by X-ray diffraction analysis, element analyses, IR and UV-Visible spectroscopy. X-ray analysis reveal that the structures of both complexes are similar configuration and differently spatial symmetries. The complex <strong>1</strong> crystallizes in the triclinic <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>P<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i>ī space group with the respective cell parameters: <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>a<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 9.1189(18) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#F7F7F7;">Å</span></span>, <span style="font-family:" font-size:13.3333px;white-space:normal;"=""><i></i></span><i>b<span style="font-family:" font-size:13.3333px;white-space:normal;"=""></span></i> = 9.836(2) <span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;
文摘Using two new flexible and functional nitronyl nitroxide radicals as ligands, two copper (II) complexes {[Cu(hfac)<sub>2</sub>]<sub>3</sub>(NITmPhO3Py)<sub>2</sub>}<sub>n</sub> (1) and [Cu(hfac)<sub>2</sub><sub> </sub>(NIToPhO3Py)]<sub>2</sub> (2) (NITmPhO3Py = 2-[(3-methoxy-pyridinyl)phen-3-yl]- 4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, NIToPhO3Py = 2-[(3-methoxy-pyridinyl)phen-2-ly]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, hfac = hexafluoroacetylacetone), have been characterized structurally and magnetically. The X-ray crystal analyses showed that complex 1 displayed a chain polymer structure which formed with {[Cu(hfac)<sub>2</sub>]<sub>3</sub>(NITmPhO3Py)<sub>2</sub>}<sub>n</sub> due to the cross-linking of two cyclic binuclear fragments {[Cu(hfac)<sub>2</sub>]<sub>2</sub>(NITmPhO3- Py)<sub>2</sub>} via the bridging unit [Cu(hfac)<sub>2</sub>];complex 2 presented a binuclear cyclic structure [Cu(hfac)<sub>2</sub>]<sub>2</sub>(NIToPhO3Py)<sub>2</sub>. The magnetic behaviors of the two complexes 1 and 2 have been investigated. Magnetic studies showed that antiferromagnetic interactions dominated in complex 1, while there existed ferromagnetic interactions between Cu(II) and coordinated NO group in complex 2.
