ONIOM, hydrogenationenantioselectivityasymmetric catalysisDFTreaction mechanismchiral phosphineab initiovalence bondoxidative additionmigratory insertionComputations utilizing the ONIOM scheme have been used to model key features of the the Rh(chiral bisphosphine)-catalyzed enantioselective hydrogenation of prochiral ...
Primary alkyl halides have broad utility as fine chemicals in organic synthesis. The direct halogenation of alkenes is one of the most efficient approaches for the synthesis of these halides. Internal alkenes, in particular mixtures of isomers from refin
Olefin is a crucial chemical intermediate that is in high demand for polymer production. The catalytic alkyne semi-hydrogenation process represents a promi
Typical procedure for the catalytic hydrogenation of alkenes Hydrogenation of alkenes (97% for n-hexene and 96% for cyclooctene) was carried out in ethyl acetate solution in a static hydrogen atmosphere (1 bar). In a typical experiment, the catalyst (0.01 g) was loaded in a reactor, and...
In recent years, graphite carbon nitride (g-C3N4) are extensively applied in numerous organic transformations like reduction reaction, C–C bond formation, C–H activation reaction, oxidation reaction, hydrogenation of alkenes and alkynes, cyclization reaction and epoxidation etc. Furthermore, Due to ...
Mechanism of the rhodium porphyrin-catalyzed cyclopropanation of alkenes. Science 256, 1544–1547 (1992). Article CAS PubMed Google Scholar Wolf, J. R. et al. Shape and stereoselective cyclopropanation of alkenes catalyzed by iron porphyrins. J. Am. Chem. Soc. 117, 9194–9199 (1995). ...
Segal,A. Efraty.Heterogeneous Catalytic-Hydrogenation of Alkenes and Alkynes in the Presence of Coordination Polymers of Palladium(0-Ⅱ) And Platinum(0-Ⅱ). Journal of Organometallic Chemistry . 1985Heterogeneous Catalytic-Hydrogenation of Alkenes and Alkynes in the Presence of Coordination Polymers of...
Fig. 7. Mechanism for the tandem cracking-alkylation process of polyolefin [86]. Liu et al. recently introduced a temperature-gradient pyrolysis method that converts PE and PP into controlled wax depolymerization products with an 80 % yield, utilizing precise temperature control (Fig. 8) [87]....
protonate/deprotonate upon pH change, resulting pH-regulated wettability of the systems. In an example, Yang et al.62reported an in situ preparation method of sub-micrometer size solid catalysts for hydrogenation of styrene via tuning the pH value of solution (Fig.2d). In this example, hairy...
The product selectivity in catalytic hydrogenation of nitriles is strongly correlated with the structure of the catalyst. In this work, two types of atomically dispersed Pd species stabilized on the defect-rich nanodiamond-graphene (ND@G) hybrid support: