Facile synthesis of a ruthenium carbene complex with a cis-chelating diphosphinoethane ligand

Ruthenium‐Catalyzed Ring‐Closing Metathesis: Recent Advances, Limitations and Opportunities

“…In a rare example of the latter approach, Hofmann's group demonstrated that impressive increases in ROMP activity can be effected by chloride abstraction from C26a to generate dicationic dimer C31 (Scheme 15) [120,123,124]. The dative chloride bonds in such edge-bridged catalysts are labile, in contrast to the thermodynamic stability of facebridged dimers Ru 2 (µ-Cl) 3 (e.g.…”

Organometallic Chemistry

“…In the mechanism of the Dötz reaction, he found that chromacyclobutene structures were unrealistic intermediates and instead proposed vinylcarbene complexes as much more stable isomers [64,68,88]. Other research projects of his group included the synthesis of ruthenium-carbene com-plexes with cis-dichloro ligands for olefin metathesis catalysis [86,87,90,91,[98][99][100]108,132,138,147], the characterization of copper-carbene complexes as intermediates in the cyclopropanation of alkenes [102,106,113,119,120], as well as detailed studies into the mechanism of the hydroformylation of alkenes. An improved understanding of this industrially important process was achieved by a combination of ligand design for the rhodium catalysts, kinetic studies, and high-level quantumchemical calculations [126,135,142,145,146,152,155].…”

Sterically crowded diphosphinomethane ligands: molecular structures, UV-photoelectron spectroscopy and a convenient general synthesis of tBu2PCH2PtBu2 and related speciesDedicated to Professor Roald Hoffmann on the occasion of his 65th birthday.Electronic supplementary information (ESI) available: photoelectron spectra for compounds 1–6, ORTEP diagrams for compounds 1–3 and 5–9+, calculated minimum structures (UB3LYP/6-31G**) and structural parameters for two forms of the radical cation dmpm. See http://ww

“…The ethylene-bridged analogue of 1, dtbpe ( 6), has been used to support interesting chemistry on nickel, [60][61][62][63][64][65][66] palladium, 67 platinum 68 and ruthenium. [69][70][71] In order to compare this ligand with 1, its structure was also determined crystallographically and an ORTEP diagram is shown in Fig. 5.…”