Synthesis, Structure, and Magnetic Properties of [(CH3CN)5V−O−V(CH3CN)5][BF4]4
| العنوان: | Synthesis, Structure, and Magnetic Properties of [(CH3CN)5V−O−V(CH3CN)5][BF4]4 |
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| المؤلفون: | Thomas P. Vaid, Narpinder Kaur, Julie A. Cissell, Naresh S. Dalal, Saritha Nellutla |
| المصدر: | Inorganic Chemistry. 46:9672-9677 |
| بيانات النشر: | American Chemical Society (ACS), 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Vanadium, chemistry.chemical_element, Magnetic susceptibility, law.invention, Inorganic Chemistry, chemistry.chemical_compound, Crystallography, Magnetization, chemistry, Ferromagnetism, Computational chemistry, law, Physical and Theoretical Chemistry, Ground state, Acetonitrile, Electron paramagnetic resonance, Single crystal |
| الوصف: | The reaction of vanadium(III) acetylacetonate with HBF4 in acetonitrile yields [(CH3CN)5V-O-V(CH3CN)5][BF4]4, a material that serves as a convenient precursor to other [V-O-V]4+ species such as [(bipy)2(CH3CN)V-O-V(CH3CN)(bipy)2][BF4]4 (bipy=2,2'-bipyridine). Single-crystal X-ray diffraction shows that the V-O-V linkage of [(CH3CN)5V-O-V(CH3CN)5]4+ is linear. An Evans method measurement of the solution-phase magnetic susceptibility indicates strong ferromagnetic coupling between the vanadium centers. Magnetic susceptibility (chi) and magnetization (M(H)) data for a powdered sample and for a single crystal oriented with its V-O-V axis parallel to the applied field were measured over 1.8-300 K. The results suggest that the V(III) centers are ferromagnetically coupled with J approximately 72 K (approximately 50 cm(-1)) yielding a ground state with a total spin Stotal=2. Theoretical fit to the M(H) plot for the single crystal yielded g||=2.01+/-0.01 and the zero-field splitting parameter D=0.60+/-0.04 K (0.42+/-0.03 cm(-1)). EPR measurements at 34 and 101.6 GHz are consistent with the Stotal=2 ground state and yield g||=1.9825, g perpendicular=1.9725 and D=0.57+/-0.03 K. |
| تدمد: | 1520-510X 0020-1669 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b07478f9b372ae832a6262862fb8dc9 https://doi.org/10.1021/ic700920z |
| رقم الأكسشن: | edsair.doi.dedup.....8b07478f9b372ae832a6262862fb8dc9 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 1520510X 00201669 |
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