Ruthenium(II) carbonyl complexes containing ‘pincer like’ ONS donor Schiff base and triphenylphosphine as catalyst for selective oxidation of alcohols at room temperature
the coupling of phosphorus atoms with azomethine proton. The single crystal X-ray analysis of [Ru(L5)(CO)(PPh3)2] revealed that Schiff base ligand is coordinated to the metal center, via dissociation of the two acidic protons, as a dianionic tridentate ONS donor and that ruthenium(II) ion adopts octahedral coordination with the phosphorus atoms in trans-disposition. Rutheniumcomplexes have been used
H 2 L与[RuHCl(CO)(PPh 3)3 ]在甲苯中的反应得到[Ru(L)(CO)(PPh 3)2 ](L =衍生自水杨醛/ 4-取代的水杨醛的二齿三齿ONS供体配体/ 2-羟基-1-萘醛和邻氨基苯硫酚)在室温下。通过元素分析和紫外可见,FT-IR,1 H,1 3 C和31 P NMR光谱法对所有配合物进行表征。[Ru(L4)(CO)(PPh 3)2的1 H- 1 H COZY和1 H- 31 P HMBC光谱]已经研究过。1 H- 31 P HMBC光谱建立了磷原子与偶氮甲碱质子的偶联。[Ru(L5)(CO)(PPh 3)2 ]的单晶X射线分析表明,席夫碱配体通过两个酸性质子的解离作为二阴离子三齿ONS供体而配位到金属中心。钌(II)离子八面体采用与磷原子配位的反式-disposition。钌配合物已与N-甲基吗啉-N结合使用氧化物(NMO),用于在室温下催化氧化各种醇。苄基伯醇
Synthesis of triethylphosphite complexes of nickel(II) and palladium(II) with tridentate Schiff base ligand for catalytic application in carbon–carbon coupling reactions
作者:M. Muthu Tamizh、R. Karvembu
DOI:10.1016/j.inoche.2012.08.016
日期:2012.11
(electronic, FT–IR, 1H, 13C and 31P NMR) methods. The 1H–31P HMBC spectrum established the coupling of phosphorus with the azomethine proton of the Schiff base and the aliphatic protons of triethylphosphite. Novel Ni(II) and Pd(II) complexes exhibited good catalytic activity in Kumada–Tamao–Corriu and Suzuki–Miyaura coupling reactions respectively.
bidentate functionalized phosphines and tridentate Schiffbase (SB) ligands have been synthesized via ligand-exchange reactions starting from labile Re(V) precursors. A convenient route of synthesis is provided by the isolation of intermediate species such as [Re(O)(Ln)Cl3]− (1–3), (Ln=bidentate phosphino-phenolato or phosphino-carboxylato ligands). Subsequent addition of the relevant SB affords neutral
phosphatase studies have indicated that enzymatic activity is concentration dependent which is inversely proportional to the concentration of the compounds. The biological assays (brine shrimp cytotoxicity, DPPH) have reflected their biologically active and mild antioxidant nature. However, results of DNA protection assay have shown that they possess moderate protective activity against hydroxyl free radicals
摘要 由水杨醛和氨基或苯硫酚衍生的三齿席夫碱的 N-(2-氧化苯基)水杨亚氨基三苯基膦钯 (II) (1) 和 N-(2-硫代苯基) 水杨亚氨基三苯基膦钯 (II) (2) 的配合物具有通过各种光谱、分析和电分析技术合成和表征。配合物 1 的 X 射线单晶分析揭示了它的方形平面几何形状。热分析表明不存在配位水,最终降解产物是 PdO。碱性磷酸酶研究表明酶活性是浓度依赖性的,它与化合物的浓度成反比。生物测定(盐水虾细胞毒性,DPPH)反映了它们的生物活性和温和的抗氧化性质。然而,DNA 保护试验的结果表明它们对羟基自由基 (OH) 具有中等保护活性。伏安研究通过纯扩散控制过程确定了化合物的双电子还原,并揭示了药物 DNA 相互作用的嵌入模式。
Synthesis, Characterization, and Ethylene Polymerization of Group IV Metal Complexes with Mono-Cp and Tridentate Aryloxide or Arylsulfide Ligands
作者:Jun Zhang、Yue-Jian Lin、Guo-Xin Jin
DOI:10.1021/om700338y
日期:2007.7.30
CpZr[ONOR]Cl [R = H (5)], respectively. Complexes 1−5 were characterized by IR and 1H NMR spectra and elemental analyses, and their molecular structures have been determined by X-ray diffraction methods. The coordination properties of these complexes have been investigated in the solid state and compared to related systems. When activated by excess methylaluminoxane (MAO), these complexes can be used as
半夹心钛和锆的复合物具有三齿双阴离子芳醚或arylsulfide配体[R-2 - (2-XC 6 H ^ 4)N CH}℃ 6 ħ 2 O] 2 -([XNO - [R ] 2 -,R = H ,X = O(L1); R = 4-Me-6-Bu t(R'),X = O(L2);R = H,X = S(L3);R = 4-ME-6-卜吨(R′),X = S(L4))。CpMCl 3(M = Ti,Zr)与芳氧基或芳基硫醚配体(L1 - L4)的钠盐反应,得到CpTi [XNO R ] Cl [R = H,X = O(1); R = 4-ME-6-卜吨(R'),X = O(2);R = H,X = S(3); R = 4-ME-6-卜吨(R’),X = S(4)]和CpZr [ONO R ] Cl [R = H(5)]。配合物1 - 5通过IR和表征1 1 H NMR光谱和元素分析,和它们的