An iron(II) chloride complex possessing a sterically demanding ortho-phenylene-tethered bisphosphine ligand shows a high catalytic activity in the Kumada–Tamao–Corriu coupling of nonactivated alkyl halides with aryl Grignard reagents. Primary, secondary, and tertiary alkyl halides can participate as an electrophilic coupling partner. A radical clock experiment using (iodomethyl)cyclopropane exclusively gives the corresponding ring-opening coupling product, suggesting intermediacy of alkyl radical species.
use of iron-containing metal surfaces, Fe, Fe-Cr-alloy and stainless steel, for the synthesis of mixed metal Ru-Fe compounds has been studied. The studied process was reductive carbonylation of RuCl3 in the presence of a metal surface. Reactions were carried out in ethanol solutions under 10-50 bar carbonmonoxide pressure at 125 degrees C using an autoclave. During the reaction the metal surface was
Studies on mixed metal(<scp>II</scp>)–iron(<scp>II</scp>) chloride systems. Part 1. Mössbauer and X-ray powder diffraction data for M<sub>x</sub>Fe<sub>1–x</sub>Cl<sub>2</sub>·4H<sub>2</sub>O (M = Mn, Co, or Ni; x= 0–0.75) systems
作者:Bella Y. Enwiya、Jack Silver、Ian E. G. Morrison
DOI:10.1039/dt9820002231
日期:——
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作者:E. P. Talzi、D. E. Babushkin、N. V. Semikolenova、V. N. Zudin、V. A. Zakharov
DOI:10.1023/a:1010451213400
日期:——
The structures of intermediates generated by the activation of 2,6-bis[1-(2,6-dimethylphenylimino)ethyl]pyridineiron(III) chloride(1) with various cocatalysts, methylalumoxane (MAO), trimethylaluminum (TMA), and TMA in combination with B(C6F5)(3) and Ph3CB(C6F5)(4), is studied by H-1 and H-2 NMR spectroscopy. The 1/AlMe3 system exhibits a higher catalytic activity in ethylene polymerization than the 1/MAO system, The activity of the latter decreases sharply with a decrease in the amount of AlMe3 in MAO. Neutral Fe(II) complexes rather than cationic intermediates are suggested to be active components in both catalytic systems.