Preparation, Characterization, and Reactivity of Dinitrogen Molybdenum Complexes with Bis(diphenylphosphino)amine Derivative Ligands that Form a Unique 4-Membered P–N–P Chelate Ring
revealed that the competition between the back-donation from metal to dinitrogen and that from metal to ligand was affected by P–N–P bite angle and the dihedral angle of N-substituent of ligand. In order to examine the reactivity with respect to conversion of dinitrogen to ammonia, protonation and trimethylsilylation reactions of the coordinateddinitrogens were carried out for 2R.
Rhenium(I) Phosphazane Complexes for Electrocatalytic CO<sub>2</sub> Reduction
作者:Matthew R. Crawley、Karthika J. Kadassery、Amanda N. Oldacre、Alan E. Friedman、David C. Lacy、Timothy R. Cook
DOI:10.1021/acs.organomet.9b00138
日期:2019.4.8
A library of 11 rhenium phosphazane complexes was synthesized and characterized for fundamental studies of electrochemical CO2 reduction. Because they contain chelating phosphorus donors, these complexes prevent deleterious dimerization of the precatalyst similarly to their monodentate analogues. These chelating species open a coordination site without complete ligand loss, which is hypothesized to
合成了11个磷氮烷络合物的文库,并对其进行了电化学CO 2还原的基础研究进行了表征。由于它们含有螯合的磷供体,因此与它们的单齿类似物类似,这些络合物可防止前催化剂的有害二聚。这些螯合物质在没有完全失去配体的情况下打开了配位点,据推测这会增加催化剂的寿命。此外,磷氮烷配体提供了用于合成修饰的位点,以控制电子结构,空间体积和安装氢键供体。来自CO的形成CO的这些参数的影响2在法拉第效率,催化电流响应(的上下文中进行了研究我猫/i p)和催化剂寿命。完整的结构表征可洞悉配合物之间的催化性能差异,包括二价hen变体。Re(PNP H)(bpy)(CO)2 OTf(bpy = 2,2'-联吡啶,PNP H =(Ph)2 PNHP(Ph)2)在(i cat / i p)2时显示出高催化性能值795,并且活动> 24小时,法拉第效率为94%。该电催化剂库建立了新的可调谐Re络合物类,可从中更深入地了解CO
Insights into Formate Oxidation by a Series of Cobalt Piano-Stool Complexes Supported by Bis(phosphino)amine Ligands
作者:Andrew W. Cook、Thomas J. Emge、Kate M. Waldie
DOI:10.1021/acs.inorgchem.1c00563
日期:2021.5.17
accepting ability of these CoIII centers and to evaluate their reactivity toward the oxidation of formate. We find that the hydride accepting ability of 1–4 ranges from 71 to 74 kcal/mol in acetonitrile, which should favor a highly exergonic reaction with formate through direct hydride transfer. Formate oxidation was demonstrated at elevated temperatures in the presence of stoichiometric quantities
A rigid S‐functionalized metalloligand is used to pair Janus Au‐coated silica microspheres and the resulting assemblies are assessed with optical microscopy. New Pd complexes provide stable molecularinterconnects, and the metal centre controls the structure of the linker and provides the desired rigidity, by virtue of its well‐established coordination chemistry.
Mono- and polynuclear Ag(<scp>i</scp>) complexes of N-functionalized bis(diphenylphosphino)amine DPPA-type ligands: synthesis, solid-state structures and reactivity
作者:Alessio Ghisolfi、Christophe Fliedel、Pierre de Frémont、Pierre Braunstein
DOI:10.1039/c6dt04755f
日期:——
DPPA-type ligands (Ph2P)2N(p-Z)C6H4 (Z = H, SMe, OMe) led to Ag(I) complexes of various nuclearities and an unexpected influence of the para-substituent Z is observed, including for CH2Cl2 activation.