氧钒(V) 三乙醇胺化物1 和氧钒(V) 三2-丙醇胺化物2 的结构已经确定。在每种情况下,V(V) 原子都表现出扭曲的三角双锥配位与轴向位置的氮原子和氧代基团。观察到变形是因为钒原子在双键氧的方向上移出三乙醇胺氧的平面。化合物1在单斜空间群P2 1 中结晶,a=7.051(2) A, b=7.429(2) A, β=93.46(3) o , V=417.2(2) A 3 , Z=2
Syntheses, X-ray Structures, and Solution Properties of [V<sub>4</sub>O<sub>4</sub>{(OCH<sub>2</sub>)<sub>3</sub>CCH<sub>3</sub>}<sub>3</sub>(OC<sub>2</sub>H<sub>5</sub>)<sub>3</sub>] and [V<sub>4</sub>O<sub>4</sub>{(OCH<sub>2</sub>)<sub>3</sub>CCH<sub>3</sub>}<sub>2</sub>(OCH<sub>3</sub>)<sub>6</sub>]: Examples of New Ligand Coordination Modes
作者:Debbie C. Crans、Feilong Jiang、John Chen、Oren P. Anderson、Mary M. Miller
DOI:10.1021/ic961037g
日期:1997.3.1
Tetranuclear vanadium complexes with alkoxy ligands, [V(4)O(4)&mgr;,&mgr;,&mgr;(3)-(OCH(2))(3)CCH(3)}(2)(OCH(3))(6)] (1) and [V(4)O(4)&mgr;-(OCH(2))(3)CCH(3)}&mgr;,&mgr;(3)-(OCH(2))(3)CCH(3)}&mgr;,&mgr;,&mgr;(3)-(OCH(2))(3)CCH(3)}(OR)(3)] (R = C(2)H(5) (2), R = CH(CH(3))(2) (3), R = CH(3) (4)), were synthesized by reacting VO(OR)(3) and H(3)thme (H(3)thme = 1,1,1-tris(hydroxymethyl)ethane) in alcohol
Synthesis, Structure, and Reactivity of Dinuclear Nickel Amino-Thiophenolate Complexes Bearing Bridging VO<sub>2</sub>(OH)<sub>2</sub><sup>–</sup>and VO<sub>2</sub>(OR)<sub>2</sub><sup>–</sup> Coligands
作者:Vasile Lozan、Jochen Lach、Berthold Kersting
DOI:10.1021/ic300085f
日期:2012.5.7
A series of novel mixed ligand dinickel complexes of the type [NiII2L(μ-L′)]+, where L′ is a tetrahedral oxo-alkoxo vanadate (L′ = [O2VV(OR)2]−, R = H or alkyl) and L a macrocyclicN6S2 supporting ligand, have been prepared, and their esterification reactivity has been studied. The orthovanadate complex [Ni2L(μ-O2V(OH)2)]+ (2), prepared by reaction between [Ni2L(μ-Cl)]ClO4 with Na3VO4 and a phase transfer
Enantioselective Vanadium-Catalyzed Oxidative Coupling: Development and Mechanistic Insights
作者:Houng Kang、Madison R. Herling、Kyle A. Niederer、Young Eun Lee、Peddiahgari Vasu Govardhana Reddy、Sangeeta Dey、Scott E. Allen、Paul Sung、Kirsten Hewitt、Carilyn Torruellas、Gina J. Kim、Marisa C. Kozlowski
DOI:10.1021/acs.joc.8b02083
日期:2018.12.7
vanadium catalyst for enantioselectiveoxidativecoupling of phenols is reported, ultimately resulting in a simple monomeric vanadium species combined with a Brønsted or Lewis acid additive. The resultant vanadium complex is found to effect the asymmetric oxidative ortho–ortho coupling of simple phenols and 2-hydroxycarbazoles with good to excellent levels of enantioselectivity. Experimental and quantum
Mono- and Dinuclear Oxovanadium(V)calixarene Complexes and Their Activity as Oxidation Catalysts
作者:Elke Hoppe、Christian Limberg、Burkhard Ziemer
DOI:10.1021/ic061106j
日期:2006.10.1
as catalysts for the oxidation of alcohols with O2. It turned out that the two dinuclear complexes efficiently catalyze the oxidation of 1-phenyl-1-propargyl alcohol and fluorenol; in addition, they even show some activity with respect to the oxidation of dihydroanthracene. This may hint to a higher activity of dinuclear sites on the surfaces of heterogeneous catalysts as well.
Polyoxovanadate–Alkoxide Clusters as a Redox Reservoir for Iron
作者:Feng Li、Stephanie H. Carpenter、Robert F. Higgins、Mark G. Hitt、William W. Brennessel、Maryline G. Ferrier、Samantha K. Cary、Juan S. Lezama-Pacheco、Joshua T. Wright、Benjamin W. Stein、Matthew P. Shores、Michael L. Neidig、Stosh A. Kozimor、Ellen M. Matson
DOI:10.1021/acs.inorgchem.7b00650
日期:2017.6.19
IR, electronic absorption, and 1H NMR spectroscopies. Moreover, Mössbauer and X-ray absorption spectroscopies suggest that the redox events involve primarily the vanadiumions, while the iron atoms remained in the 3+ oxidation state throughout the redox series. In this sense, the vanadium portion of the cluster mimics a conventional organic-based redox-active ligand bound to an iron(III) ion. Magnetic
受到使用常规有机基氧化还原活性配体实现的多电子氧化还原化学的启发,我们表征了一系列铁官能化的聚氧钒酸盐-醇盐簇,其中金属氧化物支架充当三维电子缺陷型金属配体。通过顺序还原制备了四个杂金属簇,表明金属氧化物支架能够存储多达四个电子。这些还原产物的特征在于循环伏安法,红外光谱,电子吸收和11 H NMR光谱。此外,Mössbauer和X射线吸收光谱表明,氧化还原事件主要涉及钒离子,而铁原子在整个氧化还原系列中均保持3+氧化态。从这个意义上讲,簇的钒部分模拟了结合到铁(III)离子上的常规有机基氧化还原活性配体。使用SQUID磁力分析法对六核簇内的磁耦合进行了表征。总体而言,结果表明,团簇核心金属中心之间发生了广泛的电子离域。这些结果证明了电子柔性,可还原的金属氧化物载体具有充当过渡金属中心的氧化还原活性储层的功能。