Catalytic dehydrogenation of cyclooctane with neutral iridium(I) complexes
作者:Silke Taubmann、Helmut G. Alt
DOI:10.1016/j.jorganchem.2008.02.003
日期:2008.5
A series of new 1,5-cyclooctadiene iridium(I) complexes with chelating ligands has been synthesized. The ligands are naphthoxyimines, carboxylates and alcoholates. The complexes catalyze the homogeneous dehydrogenation of cyclooctane to give cyclooctene and hydrogen without an external hydrogen acceptor up to rates of 75 turnovers. The catalysts are active for at least 48 h at a temperature of 300 °C
Catalytic dehydrogenation of cyclooctane in homogeneous solution with titanium, zirconium and hafnium complexes containing N,O-chelating ligands
作者:Sandra Taubmann、Helmut G. Alt
DOI:10.1016/j.molcata.2008.04.005
日期:2008.6
A series of new titanium, zirconium and hafnium complexes with the heteroatom chelating ligands hydroxyquinolines, hydroxypyridines and hydroxyimines were synthesized. The complexes were activated with MAO and successfully tested for the catalytic CH activation reactions of cyclooctane. They gave TONs of 1.7–18.7 (300 °C, 16 h) in homogeneous solution. The TONs were clearly influenced by the ligand