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Asymmetric Hydrogenations with Rhodium Chiral Phosphine Catalysts
Stereospecific and Regioselective Hydrogenation of the Tricyclo4 2 2 025
Asymmetric Synthesis via PolymerAttached Optically Active Catalysts By
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1-pentene acid active added addition alcohol allyl amine amounts appears asymmetric atom base benzene bond carbon carbonyl carried catalyst Chem Chemical chemistry chiral cobalt complex compounds concentration containing conversion coordination coupling derivatives determined diene DIOP double effect electron Equation example experiments FIGURE formation formed gave give homogeneous hydride hydroformylation hydrogenation important increases indicated initial intermediate involved isomerization isoprene leading Lett ligand mechanism metal metal carbonyl methyl mixture mmoles mole norbornadiene observed obtained occur olefin optical organic Organomet oxidation palladium phase phosphine polymer possible precursor prepared presence pressure proposed radical ratio reaction reduction Reference reported rhodium SCHEME selectivity shown shows similar solution solvent species spectra spectrum step stereoselectivity steric structure studies substitution suggests synthesis TABLE temperature Tetrahedron thermal tion trans trans/cis transition metal various yield