Stable pentaammineruthenium(III) complexes of reductic acids: synthesis, linkage isomers, and autoxidation kinetics
作者:D. M. Bryan、S. D. Pell、R. Kumar、Michael J. Clarke、V. Rodriguez、M. Sherban、J. Charkoudian
DOI:10.1021/ja00213a023
日期:1988.3
Preparation de complexes ammino d'ascorbate ou de tetramethylreductate. Spectres UV-visible et RMN. Etude par voltammetrie cyclique. La vitesse d'autoxydation des complexes reductate a pH 7 et a 25°C est du 1er ordre
制备氨基d'抗坏血酸盐或四甲基还原酸盐复合物。Spects 紫外可见光等 RMN。练习曲 par voltammetrie cyclique。La vitesse d'autooxydation des complexes reductate a pH 7 et a 25°C est du 1er ordre
Binuclear Ion Containing Nitrogen as a Bridging Group
作者:D. F. Harrison、E. Weissberger、H. Taube
DOI:10.1126/science.159.3812.320
日期:1968.1.19
A binuclear ion ([NH3)5RuN2Ru(NH3)5]5+ is formed by the direct reaction of N2 with an aqueous solution of (NH3)5RuOH22+ at room temperature. The binuclear ion is also formed by the reversible reaction of (NH3)5RuOH22+ with (NH3)5RuN22+. Solid [(NH3)5RuN2Ru(NH3)5] (BF4)4 has been prepared, and its ultraviolet and infrared spectra are reported.
Reactions of pentaammineruthenium complexes with 1,2- and 1,4-dicyanobenzene and cyanobenzamides: evidences of neighboring group participation
作者:Elia Tfouni、Antônio Marcos de Souza Macêdo、Luciana nunes Cardoso、Kleber Queiroz Ferreira、Érica Cristina de Oliveira、Zênis Novais da Rocha
DOI:10.1016/j.ica.2004.09.008
日期:2005.6
ino-1-oxo-isoindoline) are described. Oxidation of [Ru(NH 3 ) 5 L] 2+ , at 0 ⩽ pH ⩾ 6, is followed by hydrolysis of the coordinated nitrile to give amide complexes in which the amide is through the nitrogen, with pH-dependent rate constants. The estimated values of the rate constant of hydrolysis ( k obs ) at 25 °C are 2.9 × 10 −3 s −1 for [Ru(NH 3 ) 5 (1,4-dcb)] 3+ and 5.6 × 10 −3 s −1 for [Ru(NH
Terpsichorean Movements of Pentaammineruthenium on Pyrimidine and Isocytosine Ligands
作者:Kathleen J. LaChance-Galang、Ishael Maldonado、M. Louise Gallagher、Wei Jian、Alfred Prock、Jerome Chacklos、Roy D. Galang、Michael J. Clarke
DOI:10.1021/ic000512e
日期:2001.1.1
(UV-vis) measured pKa values for the two endocyclic sites for the ICyt complex are 2.78 and 9.98, and for 6MeICyt are 3.06 and 10.21, which are probably weighted averages for ionization from N3 and N1, respectively. Activation parameters for the rotamerizations were determined by variable-temperature NMR at pKa1 < pH < pKa2 for the complexes with (ICyt-kappa N2)-, (6MeICyt kappa N2)-, and 2AmPym kappa N2
五氨合钌通过旋转和键合异构化作用在双氮杂环上移动,这可能会影响潜在的钌金属药物的生物活性。通过1 H NMR测定了[(NH3)5RuIII]与异胞嘧啶(ICyt)和6-甲基异胞嘧啶(6MeICyt)的环外氮协调的快速旋转速率。由于这些旋转异构体可以通过配位的胺与N1和N3环内氮之间的氢键来稳定,因此旋转异构化是在pH控制下进行的。用分光光度法(紫外可见)测得的ICyt络合物两个内环位点的pKa值分别为2.78和9.98,而6MeICyt的pKa值为3.06和10.21,这可能分别是N3和N1离子化的加权平均值。通过与(ICyt-kappa N2)-,(6MeICyt-kappa N2)-和2AmPym kappa N2的配合物在pKa1
Kinetics and mechanism of the reduction of thiocyanato-, isothiocyanato-, and azido-penta-amminecobalt(III) by penta-ammineaquaruthenium(II) in aqueous solutions
measurements have been made on the reactions of [Ru(NH3)5(OH2)]2+ with [Co(NH3)5X]2+(X = SCN, NCS, or N3) in aqueous solution. The reactions obey second-order rate laws with the following kinetic parameters at 25 °C, I= 0.20 moldm–3(LiCl), and [H+]= 0.10 moldm–3(HCl): kSCN=(1.7 ± 0.10)× 102, kN3= 0.61 ± 0.02, and kNCS= 0.28 ± 0.01 dm3 mol–1 s–1; ΔH‡SCN= 35.1 ± 2.9 kJ mol–1, ΔS‡SCN=–84.5 ± 7.5 J K–1 mol–1,