Mechanistic Studies on Ruthenium(II)-Catalyzed Base-Free Transfer Hydrogenation Triggered by Roll-Over Cyclometalation
作者:Christian Kerner、Johannes Lang、Maximilian Gaffga、Fabian S. Menges、Yu Sun、Gereon Niedner-Schatteburg、Werner R. Thiel
DOI:10.1002/cplu.201600526
日期:2017.2
The synthesis of 2-substituted pyridine-pyrimidine ligands and their complexation with arene ruthenium(II) chloride moieties is reported. Depending on the electronic and steric influences of the ligand, the catalysts undergo CH activation by roll-over cyclometalation. This process opens up the route to the catalytic transfer hydrogenation of ketones with isopropanol as the hydrogen source under base-free
Gas-phase reactivity of Cp* group IX metal complexes bearing aromatic N,N′-chelating ligands
作者:Christian Kerner、Jens P. Neu、Maximilian Gaffga、Johannes Lang、Benjamin Oelkers、Yu Sun、Gereon Niedner-Schatteburg、Werner R. Thiel
DOI:10.1039/c7nj01079f
日期:——
A set of cationic group IX metalcomplexes of the type [(η5-Cp*)M(Cl)(N,N′)]+ bearing N,N′-coordinating ligands structurally related to 2,2′-bipyridine were synthesized and characterized by means of elemental analysis, spectroscopy and single crystal X-ray diffraction. These complexes can undergo two different modes of CH activation in the gas phase, which were examined by CID ESI-MS spectrometry and