Pincer‐Supported Gallium Complexes for the Catalytic Hydroboration of Aldehydes, Ketones and Carbon Dioxide
作者:Lingyu Liu、Siu‐Kwan Lo、Cory Smith、Jose M. Goicoechea
DOI:10.1002/chem.202103009
日期:2021.12.9
novel gallium hydride complexes supported by an N,N-bis(3,5-di-tert-butyl-2-phenoxy)amine pincer ligand is described and their activity as catalysts for the catalytic reduction of aldehydes, ketones and carbondioxide is explored.
Complexes of the 14th group elements with tridentate redox-active ligand
作者:A. V. Piskunov、O. Yu. Sukhoshkina、I. V. Smolyaninov
DOI:10.1134/s1070363210040195
日期:2010.4
New methods of synthesis of the 14th group metal (Si, Sn, Pb) complexes containing a redox-active ligand, 3,5-di-tert-butyl-1,2-quinone-1-(2-hydroxy-3,5-di-tert-butylphenyl)imine, in various redox states were developed. Newcompounds were studied by the ESR spectroscopy in solutions. The redox properties of the paramagnetic tincompounds are characterized by the cyclic voltammetry. The solvent and
Equipping silicon(IV) with electron‐rich, geometrically constrained NNN‐ and ONO‐tridentate substituents leads to aminosilanes with increased Lewis acidity—expressed through the formation of Si2N2 rings by head‐to‐tail dimerization. Depending on the substituents, the dimerization can be controlled for the first time, yielding monomeric, structurally reversible and dimeric states. The monomeric species
为硅(IV)配上富含电子,受几何约束的NNN和ONO三齿取代基会导致氨基硅烷具有增加的Lewis酸度-通过头尾二聚形成Si 2 N 2环来表达。取决于取代基,可以首次控制二聚化,产生单体,结构可逆和二聚状态。单体物种在硅处显示出从四面体向平面几何形状的明显变形。氨基硅烷的二聚化和路易斯酸度通过(概念性的)DFT,NBO,ETS-NOCV和QTAIM方法得到合理化。硅的预组织,取代基之间的伦敦分散和形成的Si 2 N 2内部的共振现象四环化合物被认为是二聚化的驱动力。与所选氨基硅烷的比较可以得出关于硅物种的路易斯酸度和两亲性化合物聚集的一般性结论。
Metal effects on ligand non-innocence in Group 5 complexes of the redox-active [ONO] pincer ligand
作者:Steven Hananouchi、Brandon T. Krull、Joseph W. Ziller、Filipp Furche、Alan F. Heyduk
DOI:10.1039/c4dt02259a
日期:——
structures indicate that the niobiumderivative is electronically analogous to the tantalum analog 1-Ta, containing a reduced (ONO) ligand and a niobium(V) metal ion, [ONOcat]NbVCl2(OEt2); whereas, the vanadiumderivative is best described as a vanadium(IV) complex, [ONOsq]VIVCl2(THF). One-electron oxidation was carried out on all three metal complexes to afford [ONO]MCl3 derivatives (3-V, 3-Nb, 3-Ta). For
制备了双(3,5-二叔丁基-2-苯酚)胺([ONO] H 3)的同构钒,铌和钽配合物,并进行了表征,以评估金属离子对金属氧化还原活性的影响。配体平台。制备了具有通式[ONO] MCl 2 L(M = V,L = THF,1-V ; M = Nb,L = Et 2 O,1-Nb)的新钒和铌配合物,并通过X进行结构分析射线晶体学。固态结构表明,铌衍生物与钽类似物1-Ta在电子上相似,其包含还原的(ONO)配体和铌(V)金属离子,[ONO cat ] Nb VCl 2(OEt 2);钒衍生物最好描述为钒(IV)络合物[ONO sq ] V IV Cl 2(THF)。在所有三种金属络合物上进行单电子氧化,得到[ONO] MCl 3衍生物(3-V,3-Nb,3-Ta)。对于所有三种衍生物,氧化发生在(ONO)配体上。在铌和钽的情况下,获得了表征为[ONO sq ] M V Cl 3的电子相似的配合物
Aluminum complexes of the redox-active [ONO] pincer ligand
作者:Géza Szigethy、Alan F. Heyduk
DOI:10.1039/c2dt30295k
日期:——
redox-active ligand bis(3,5-di-tert-butyl-2-phenol)amine ([ONO]H3) in three different oxidation states were synthesized. The aluminum halide salts AlCl3 and AlBr3 were reacted with the doubly deprotonated form of the ligand to afford five-coordinate [ONHOcat]AlX(solv) complexes (1a, X = Cl, solv = OEt2; 1b, X = Br, solv = THF), each having a trigonal bipyramidal coordination geometry at the aluminum