436145-58-3Relevant academic research and scientific papers
Enhancement in catalytic proton reduction by an internal base in a diiron pentacarbonyl complex: its synthesis, characterisation, inter-conversion and electrochemical investigation
Li, Zhimei,Xiao, Zhiyin,Xu, Fenfen,Zeng, Xianghua,Liu, Xiaoming
, p. 1864 - 1871 (2017)
The reaction of a tripodal ligand (H2L) with a {S2N} donor-set with tri-iron dodecacarbonyl in toluene leads to the isolation of a diiron pentacarbonyl complex 1 as a model for the sub-site of the [FeFe]-hydrogenase. Protonation of this complex under CO (1 atm.) forms quantitatively the hexacarbonyl complex 2H+ with a pendant pyridinium group. Infrared spectroscopic investigations indicate that its pendant pyridinium group dissociates to give hexacarbonyl complex 2 which forms subsequently the pentacarbonyl complex 1. The electrochemistry of these complexes has been investigated. Complex 2H+ exhibits electrocatalysis on proton reduction at a potential more positive by over 200 mV compared to that for other neutral diiron hexacarbonyl complexes. This catalysis is enhanced under a CO atmosphere by freeing the bound base group which acts as a proton relay in the catalysis.
Copper(II), iron(II), and manganese(II) complexes of 2-methyl-2-(2- pyridinyl)-1,3-propanediamine
Pal Chaudhuri, Urmila,Shakya, Rajendra,McClain, James M.,Klein, Eric L.,Powell, Douglas R.,Grohmann, Andreas,Houser, Robert P.
, p. 84 - 90 (2013)
Copper(II), iron(II), and manganese(II) complexes of 2-methyl-2-(2- pyridinyl)-1,3-propanediamine (ppda) were synthesized and characterized. The reaction of copper(II), iron(II), or manganese(II) salts with ppda yields complexes [Cu(ppda)Cl2] (
Selective Ruthenium-Catalyzed Transformation of Carbon Dioxide: An Alternative Approach toward Formaldehyde
Siebert, Max,Seibicke, Max,Siegle, Alexander F.,Kr?h, Sabrina,Trapp, Oliver
supporting information, p. 334 - 341 (2019/01/16)
Formaldehyde is an important precursor to numerous industrial processes and is produced in multimillion ton scale every year by catalytic oxidation of methanol in an energetically unfavorable and atom-inefficient industrial process. In this work, we present a highly selective one-step synthesis of a formaldehyde derivative starting from carbon dioxide and hydrogen gas utilizing a homogeneous ruthenium catalyst. Here, formaldehyde is obtained as dimethoxymethane, its dimethyl acetal, by selective reduction of carbon dioxide at moderate temperatures (90 °C) and partial pressures (90 bar H2/20 bar CO2) in the presence of methanol. Besides the desired product, only methyl formate is formed, which can be transformed to dimethoxymethane in a consecutive catalytic step. By comprehensive screening of the catalytic system, maximum turnover numbers of 786 for dimethoxymethane and 1290 for methyl formate were achieved with remarkable selectivities of over 90% for dimethoxymethane.
Titanium and zirconium complexes containing a novel dianionic trifunctional amido ligand
Friedrich, Stefan,Schubart, Martin,Gade, Lutz H.,Scowen, Ian J.,Edwards, Andrew J.,McPartlin, Mary
, p. 1751 - 1759 (2007/10/03)
The novel tridentate diamidoamine ligands [RC(2-C5H4N)(CH2NSiMe3) 2]2- (R = H, CH3) have been synthesized and coordinated to TiIV and ZrIV giving the pentac
