In situ electrochemical synthesis of Ni(I) complexes with aminomethylphosphines as intermediates for hydrogen evolution

The Assembly of Unique Hexanuclear Copper(I) Complexes with Effective White Luminescence

“…In our recent works, we demonstrated predominant P,P-chelate − and rather rare P,P-bridge and P,N-chelate ,, coordination modes of 1,5-diaza-3,7-diphosphacyclooctanes containing pyridyl and pyridylethyl substituents on phosphorus atoms in the mono- and dinuclear gold­(I) , and copper­(I) complexes. Reaction of ligands 1 and 2 with a copper­(I) iodide in the 1:3 ligand-to-metal ratio in acetonitrile immediately led to the precipitation of white powders, which were washed, recrystallized from the acetonitrile, and dried over vacuum to give pure white crystalline powders of complexes 3 and 4 in nearly quantitative yield (Scheme ).…”

“…The ligands in this complex have a N,P,­P,N-bridge or μ 4 -coordination mode. The conformation of heterocyclic part of the ligand is a twist-like “chair-boat”, which is rather rare for that type of ligands. ,− The bis-P,P-bridged coordination of two copper­(I) ions forms a 12-membered metallomacrocycle. The cavity of the macrocycle is covered from both sides by the substituents on the one of the nitrogen atoms of each ligand.…”

Chasing the Mond Cation: Synthesis and Characterization of the Homoleptic Nickel Tetracarbonyl Cation and its Tricarbonyl‐Nitrosyl Analogue

“…With Evans NMR method [49] a value of 2. (À1.28 V), [50] [Ni(P Ph 2 N p-Tol 2 ) 2 ] + (À1.08 V), [51] [Ni(PPh 3 ) 3 ] + (À1.06 V) [52] and [Ni(cod) 2 ] + (À0.68 V) [52] ). The p-back bonding and electron-withdrawing ability of CO compared to the other ligands with mostly s-donating character might cause this high potential value, explaining why a strong oxidant like Ag + /0.5 I 2 is necessary for the clean synthesis of 2.…”

A Nickel‐Based Pectin Metal‐Organic Framework as a Hydrogen Oxidation Reaction Catalyst for Proton‐Exchange‐Membrane Fuel Cells

“…A reversible Ni(II)/Ni(III) transition has been observed at the first oxidation peak ( Figure A). It should be noted that PG‐NaNi has quite early potentials for reduction and oxidation, which indicates that the Ni ions are located quite close in the polymer complex,whereas the separately located ions often have a wider potential gap ,. The electrochemical behavior of the PG‐NaNi MOF was further investigated by the ESR method.…”