Complexes of ruthenium(III) and -(II) with dimethylsulphoxide—II. [RuBr3(Me2SO)3] and [RuBr2(Me2SO)3]: Versatile starting materials for the syntheses of ruthenium bromo complexes
electrochemical methods. These ruthenium(III) complexes have two N(2)O(2) metal binding sites, which are linked to each other with a biphenyl bridge and acts as potential catalyst for oxidation of wide range of primary and secondaryalcohols to corresponding aldehydes or ketones with moderate to high conversion in the presence of N-methylmorpholine-N-oxide (NMO). The formation of high-valent Ru(V)=O
一系列有趣的双核钌(III)Schiff碱配合物,带有一般组成为[(EPh(3))(X)Ru-L-Ru(X)(EPh(3))的双-双酚盐/双-萘酚单元(其中E = P或As; X = Cl或Br; L =双核双阴离子四齿配体)已经合成并通过分析(元素分析,磁化率测量),光谱(FT-IR,UV-vis和EPR)表征电化学方法。这些钌(III)配合物具有两个N(2)O(2)金属结合位点,它们通过联苯桥相互连接,并充当潜在的催化剂,用于将多种伯醇和仲醇氧化为相应的醛或酮在N-甲基吗啉-N-氧化物(NMO)存在下具有中等到高的转化率。
Synthesis, spectral characterization, catalytic and antibacterial studies of new Ru(III) Schiff base complexes containing chloride/bromide and triphenylphosphine/arsine as co-ligands
The new complexes have been characterized by analytical, spectral (IR, electronic, 1H, 13C NMR and ESR), magnetic moment and electrochemical studies. An octahedral structure has been tentatively proposed for all these new complexes. All the new complexes have been found to be better catalyst for the oxidation of alcohols using molecular oxygen as co-oxidant at ambient temperature and aryl–aryl coupling
[RuX(EPh 3)L]类型的新Ru(III)Schiff碱配合物(X = Cl / Br; E = P / As; L = Schiff碱的二价阴离子)是通过1,4-缩合得到的diformylbenzene与ö氨基苯甲酸/ ö氨基苯酚/ ø在1 -aminothiophenol:2化学计量比)从[RUX反应已合成3(弗3)3 ]与适当的席夫碱配体中的苯的2:1化学计量比。新络合物的特征在于分析,光谱(红外,电子,1 H,13C NMR和ESR),磁矩和电化学研究。已经为所有这些新复合物初步提出了八面体结构。已经发现,所有新的配合物在环境温度和芳基-芳基偶联反应中,使用分子氧作为助氧化剂,都是醇氧化的较好催化剂。还对这些复合物进行了针对大肠杆菌,嗜水气单胞菌和伤寒沙门氏菌的抗菌活性研究。
Coordination behavior of ligand based on NNS and NNO donors with ruthenium(III) complexes and their catalytic and DNA interaction studies
作者:R. Manikandan、P. Viswnathamurthi
DOI:10.1016/j.saa.2012.07.028
日期:2012.11
2-acetylpyridine-4-phenyl-thiosemicarbazone HL(3) and 2-acetylpyridine-semicarbazone HL(4) with ruthenium(III) precursor complexes were studied and the products were characterized by analytical and spectral (FT-IR, electronic, EPR and EI-MS) methods. The ligands coordinated with the ruthenium(III) ion via pyridine nitrogen, azomethine nitrogen and thiolate sulfur/enolate oxygen. An octahedral geometry has been proposed
Binuclear ruthenium(III) bis(thiosemicarbazone) complexes: Synthesis, spectral, electrochemical studies and catalytic oxidation of alcohol
作者:M. Mohamed Subarkhan、R. Ramesh
DOI:10.1016/j.saa.2014.11.039
日期:2015.3
transitions in the visible region. The complexes are paramagnetic (low spin d(5)) in nature and all the complexes show rhombic distortion around the ruthenium ion with three different 'g' values (gx≠gy≠gz) at 77K. All the complexes are redox active and exhibit an irreversible metal centered redox processes (Ru(III)-Ru(III)/Ru(IV)-Ru(IV); Ru(III)-Ru(III)/Ru(II)-Ru(II)) within the potential range of 0.38-0
所有的配合物均具有氧化还原活性,并表现出不可逆的以金属为中心的氧化还原过程(Ru(III)-Ru(III)/ Ru(IV)-Ru(IV); Ru(III)-Ru(III)/ Ru(II)-相对于Ag / AgCl,Ru(II))的电位范围分别为0.38-0.86V和-0.39至-0.66 V. 此外,在伯醇和仲醇在N-甲基吗啉存在下氧化为相应的醛和酮的情况下,已经研究了其中一种络合物[Ru2Cl2(AsPh3)4(L1)](4)的催化效率。 N-氧化物(NMO)作为助氧化剂。提出高价Ru(V)O物种的形成作为催化循环的催化中间体。在伯和仲醇在N-甲基吗啉-N-存在下氧化为相应的醛和酮的情况下,研究了其中一种配合物[Ru2Cl2(AsPh3)4(L1)](4)的催化效率氧化物(NMO)作为助氧化剂。提出高价Ru(V)O物种的形成作为催化循环的催化中间体。在伯和仲醇在N-甲基吗啉-N-存在下氧
Mononuclear ruthenium(III) complexes of the type [RuX(EPh3)2(L)] (E = P or As; X = Cl or Br; L = dibasic terdentate dehydroacetic acid thiosemicarbazones) have been synthesized from the reaction of thiosemicarbazone ligands with ruthenium(III) precursors, [RuX3(EPh3)3] (where E = P, X = Cl; E = As, X = Cl or Br) and [RuBr3(PPh3)2(CH3OH)] in benzene. The compositions of the complexes have been established
[RuX(EPh 3)2(L)]型的单核钌(III)配合物(E = P或As; X = Cl或Br; L =二元叔齿脱氢乙酸硫代半氨基咔唑酮)已从硫代半碳鎓配体的反应中合成含钌(III)前体,[RuX 3(EPh 3)3 ](其中E = P,X = Cl; E = As,X = Cl或Br)和[RuBr 3(PPh 3)2(CH 3OH)]在苯中。通过元素分析,磁化率测量,FT-IR,UV-vis和EPR光谱数据确定了复合物的组成。这些络合物是顺磁性的,在二氯甲烷中表现出强烈的d-d和电荷转移跃迁。配合物在LNT处显示出菱形的EPR光谱,这是低旋转扭曲的八面体钌(III)物种的典型特征。所有的配合物均具有氧化还原活性,并显示出不可逆的以金属为中心的氧化还原过程。络合物[RuCl(PPh 3)2(DHA-PTSC)](5)在异丙醇/ KOH存在下用作酮转移氢化的催化剂,被发现是活性物质。