Synthesis, structures and oxygen atom transfer catalysis of oxo-bridged molybdenum(V) complexes with heterocyclic bidentate ligands (N,X) X = S, Se |
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Authors: | Xiaoli Ma Carola Schulzke Zhi Yang Arne Ringe Jrg Magull |
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Institution: | aInstitut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany |
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Abstract: | The dinuclear μ-oxomolybdenum(V) complexes Mo2O3(PyS)4] (1), Mo2O3(PySe)4] (2) and Mo2O3(4-CF3-PymS)4] (3) were obtained by similar reactions of the MoO2Cl2(DME)] precursor with the corresponding heterocyclic bidentate (N,X) ligands, X = S, Se, where PyS, PySe and 4-CF3-PymS are the anions of pyridine-2-thione, pyridine-2-selenolato and 4-trifluoromethyl-2-pyrimidinthiol, respectively. All compounds were characterized by elemental analysis, IR, NMR, EI-MS spectroscopy and X-ray diffraction. The crystal structures of 1–3 all include the common Mo2O3]4+ core. Compounds 1 and 2 are isostructural. The catalytic oxo-transfer properties of the molybdenum(V) compounds 1 and 2 were studied by the use of PPh3 in DMSO with a considerably higher catalytic activity for the thionato containing complex 1 than for its selenolato containing analogue 2. |
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Keywords: | μ-Oxodimolybdenum(V) compounds Oxo transfer catalysis |
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