Carbon−Oxygen and Carbon−Hydrogen Bond Cleavage Reactions of ortho-Substituted Phenols by Ruthenium(II) Complexes

Abstract

Treatment of Ru(η 4 -1,5-COD)(η 6 -1,3,5-COT) (1) (COD ) cyclooctadiene (C 8 H 12 )) with a monosubstituted phenol HOC 6 H 4 (R 1 -2) (R 1 ) OMe, CHO, CO 2 Me) in the presence of PMe 3 gives corresponding oxaruthenacycle complexes formulated as cis-On the basis of the reaction profiles monitored by NMR spectroscopy, a mechanism involving a cationic η 5 -cyclooctadienylruthenium(II) intermediate, [Ru(η 5 -C 8 H 11 )(PMe 3 ) 3 ][OAr] (11), followed by the carbon-heteroatom bond cleavage is proposed.

Reaction of CO2 with Atomic Transition Metal M+/0/– Ions: A Theoretical Study

“…Transition-metal atom, ion, metal clusters as well as metallic oxides that could convert this gas into valuable chemicals have attracted much attention. − In particular, metal ions, serving as a prototypical model of heterogeneous catalysis, with CO 2 have been studied extensively. − Bohme and co-workers reported detailed results of the transition-metal ions react with CO 2 in the gas-phase. They found that only nine transition-metal ions can get O from CO 2 at room temperature, with lots of heat released, but others can only form M + (CO 2 ) complexes.…”

Ru(II) Complexes Bearing O, O-Chelated Ligands Induced Apoptosis in A549 Cells through the Mitochondrial Apoptotic Pathway

“…The obtained FTIR spectra of Ru-1 and Ru-2 in KBr pellets are shown in Figures S6 and S7 . In the FTIR spectrum of Ru-1 and Ru-2 , the absorptions due to the stretching vibrations of the carboxylato unit have been recognized at 1597 and 1350 cm −1 [ 35 , 36 ]. The band at 702 cm −1 is attributed to the Ru–O stretch of Ru-1 .…”

Carbon−Hydrogen Bond Cleavage Reaction in 5-Coordinate Bis(2,6-dimethylbenzenethiolato)ruthenium(II) Complexes

“…One of the key factors in such bond activation processes is how to bring a C−H bond in proximity to the ruthenium center . In fact, the C−H bond cleavage reactions of phosphates, isonitrile, carbonyls, alcohols, phenols, carboxylic acids, amines, and pyridines are documented and these reactions are considered to involve prior coordination (or covalent bond formation) step before the C−H bond cleavage reactions. In addition, the C−H bond cleavage reactions by cleaving the covalent metal−chalcogen bond such as σ bond metathesis and electrophilic substitution currently attract a great deal of interest as new potential pathways for molecular transformation. − , …”