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- W2009813721 abstract "Transition-metal complexes containing redox-active quinoid ligands are of interest because of their catalytic capabilities in multielectron, substrate-activation reactions such as dioxygenase catalysis using O(2). The new catecholate complex V(V)(3,6-DBSQ)(3,6-DBCat)(2) (where 3,6-DBSQ = 3,6-di-tert-butylsemiquinone and 3,6-DBCat = 3,6-di-tert-butylcatecholate) was synthesized by combining VO(acac)(2) with 1 equiv of 3,6-DBBQ (where 3,6-DBBQ = 3,6-di-tert-butylbenzoquinone) and 2 equiv of H(2)(3,6-DBCat) in dry methanol under an inert atmosphere. The resultant complex was characterized by single-crystal X-ray diffraction, elemental analysis, near-IR, UV/vis, and electron paramagnetic resonance (EPR) spectroscopy. The crystallography as well as the near-IR and EPR studies suggest that the radical spin is localized on the 3,6-DBSQ ligand at room temperature, making V(V)(3,6-DBSQ)(3,6-DBCat)(2) a type 1 mixed-valence complex. Initial dioxygenase catalysis studies reveal that V(V)(3,6-DBSQ)(3,6-DBCat)(2) is a good dioxygenase precatalyst for the substrate H(2)(3,6-DBCat) with O(2) in ca. 600 total turnovers to >93% intra- and extradiol products with only 1-2% of the undesired benzoquinone autoxidation product." @default.
- W2009813721 created "2016-06-24" @default.
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- W2009813721 date "2009-03-24" @default.
- W2009813721 modified "2023-09-24" @default.
- W2009813721 title "Synthesis and Characterization of V<sup>V</sup>(3,6-DBSQ)(3,6-DBCat)<sub>2</sub>, a d<sup>0</sup> Metal Complex with Dioxygenase Catalytic Activity" @default.
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- W2009813721 doi "https://doi.org/10.1021/ic802122q" @default.
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