3315-32-0Relevant articles and documents
One to Find Them All: A General Route to Ni(I)-Phenolate Species
Bismuto, Alessandro,Finkelstein, Patrick,Jeschke, Gunnar,Müller, Patrick,Morandi, Bill,Trapp, Nils
supporting information, p. 10642 - 10648 (2021/07/31)
The past 20 years have seen an extensive implementation of nickel in homogeneous catalysis through the development of unique reactivity not easily achievable by using noble transition metals. Many catalytic cycles propose Ni(I) complexes as potential reac
A Reactive, Photogenerated High-Spin (S = 2) FeIV(O) Complex via O2Activation
Albert, Therese,Bill, Eckhard,Dey, Aniruddha,Goldberg, David P.,Gordon, Jesse B.,Mo?nne-Loccoz, Pierre,Sabuncu, Sinan,Siegler, Maxime A.
, p. 21637 - 21647 (2022/01/03)
Addition of dioxygen at low temperature to the non-heme ferrous complex FeII(Me3TACN)((OSiPh2)2O) (1) in 2-MeTHF produces a peroxo-bridged diferric complex Fe2III(μ-O2)(Me3TACN)2((OSiPh2)2O)2 (2), which was characterized by UV-vis, resonance Raman, and va
Concerted proton-electron transfer oxidation of phenols and hydrocarbons by a high-valent nickel complex
Fisher, Katherine J.,Feuer, Margalit L.,Lant, Hannah M. C.,Mercado, Brandon Q.,Crabtree, Robert H.,Brudvig, Gary W.
, p. 1683 - 1690 (2020/02/25)
The high-valent nickel(iii) complex Ni(pyalk)2+ (2) was prepared by oxidation of a nickel(ii) complex, Ni(pyalk)2 (1) (pyalk = 2-pyridyl-2-propanoate). 2 and derivatives were fully characterized by mass spectrometry and X-ray crystallography. Electron paramagnetic resonance spectroscopy and X-ray photoelectron spectroscopy confirm that the oxidation is metal-centered. 2 was found to react with a variety of phenolic and hydrocarbon substrates. A linear correlation between the measured rate constant and the substrate bond dissociation enthalpy (BDE) was found for both phenolic and hydrocarbon substrates. Large H/D kinetic isotope effects were also observed for both sets of substrates. These results suggest that 2 reacts through concerted proton-electron transfer (CPET). Analysis of measured thermodynamic parameters allows us to calculate a bond dissociation free energy (BDFE) of ~91 kcal mol-1 for the O-H bond of the bound pyalk ligand. These findings may shed light onto CPET steps in oxidative catalysis and have implications for ligand design in catalytic systems.