نتایج جستجو برای: hydrogenation of benzene
تعداد نتایج: 21166979 فیلتر نتایج به سال:
Rhodium and rhodium-gold catalysts supported on amorphous aluminosilicates (ASA), titanium dioxide (rutile, TiO 2 ) was prepared in two different ways: absorption colloidal method. The were characterized by an inductively coupled plasma optical emission spectrometer (ICP-OES), transmission electron microscopy (TEM) X-ray diffraction (XRD). activity selectivity of the tested hydrogenation benzen...
By modulating the chelating priorities of the different directing groups in 3,5-diketo amides with the assistance from coordinating solvent, highly chemo- and enantioselective hydrogenation of the C3-carbonyls was achieved in the presence of [RuCl(benzene)(S)-SunPhos]Cl in THF.
Structural characterization of the catalytically significant sites on solid catalyst surfaces is frequently tenuous because their fraction, among all sites, typically is quite low. Here we report the combined application of solid-state (13)C-cross-polarization magic angle spinning nuclear magnetic resonance ((13)C-CPMAS-NMR) spectroscopy, density functional theory (DFT), and Zr X-ray absorption...
The first hydrogenation step of benzene, which is endergonic in the electronic ground state (S0), becomes exergonic in the first triplet state (T1). This is in line with Baird's rule, which tells that benzene is antiaromatic and destabilized in its T1 state and also in its first singlet excited state (S1), opposite to S0, where it is aromatic and remarkably unreactive. Here we utilized this fea...
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