Preferential catalytic hydrogenation of aromatic compounds versus ketones with a palladium substituted polyoxometalate as pre-catalyst

Kogan, V.S.; Aizenshtat, Zeev; Neumann, Ronny

doi:10.1039/b110937p

Cited by 51 publications

(27 citation statements)

References 22 publications

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“…3.14. The XRD pattern of palladium metal has major diffraction peaks at 2θ = 40.1° (111) and 46.7° (200), which is in agreement with the reported literature [51]. The characteristic peaks for LPdW are observed in both cases, which indicate that the structure of LPdW remains intact after metal modification.…”

Section: X-ray Powder Diffraction Studiessupporting

confidence: 89%

Transition Metal-Substituted Salt of Tungsten-Based Polyoxometalate-Supported Mesoporous Silica as a Catalyst for Organic Transformation Reactions

Rana

Parida

2013

Environmentally Benign Catalysts

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Section: X-ray Powder Diffraction Studiessupporting

confidence: 89%

Transition Metal-Substituted Salt of Tungsten-Based Polyoxometalate-Supported Mesoporous Silica as a Catalyst for Organic Transformation Reactions

Rana

Parida

2013

Environmentally Benign Catalysts

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“…Recent studies suggest a different explanation of these results in terms of the S-structure species that are described in Section 2.3.3. Reports of the activity of the notfully-characterized products in homogeneous or biphasic solution, or supported on alumina, include catalytic oxidation of allylic alcohols, [28b] hydrogenation of arenes, [67] benzene oxidation, [63,69] reduction of nitrogen oxides by methane, [64] and electrocatalytic reduction of nitrite and H 2 O 2 . [65,66] Metal nanoparticles prepared by reduction of "K 5 [PPdW 11 O 39 ]" with H 2 have been shown to be efficient catalysts for Suzuki-, Heck-, and Stille-type C À C and C À N coupling reactions of bromo-and chloroarenes.…”

Section: Palladiummentioning

confidence: 99%

Noble Metals in Polyoxometalates

2012

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Polyoxometalates containing noble metal ions, such as ruthenium, osmium, rhodium, palladium, platinum, silver and gold, are a structurally diverse class of compounds. They include both classical heteropolyanions (vanadates, molybdates, tungstates) in which noble metals are present as heteroatoms, as well as the recently discovered class of polyoxometalates with noble metal "addenda" atoms. The focus of this Review is on complexes that should, in principle, exist as discrete molecular species in solution, and which are therefore of interest for their reactivity, their future synthetic utility and potential applications, for example, in catalysis or nanoscience.

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“…The choice of catalyst (metal and support) as well as the solvent used for reaction will also have a strong influence on the adsorption strength and geometry making the choice of solvent/catalyst for a particular selective transformation difficult to predict. There are fewer studies reporting the hydrogenation of molecules where the aromatic and carbonyl functionalities are separated/distal within the molecule such as phenylacetone [40,41] and a range of aromatic ketones including 4-phenyl-2-butanone [42].…”

Section: Introductionmentioning

confidence: 98%

Effect of solvent on the hydrogenation of 4-phenyl-2-butanone over Pt based catalysts

McManus

Daly

Thompson

et al. 2015

Journal of Catalysis

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a b s t r a c tThe hydrogenation of 4-phenyl-2-butanone over Pt/TiO 2 and Pt/SiO 2 catalysts has been performed in a range of solvents and it has been observed that the solvent impacted on the selectivity of ketone and aromatic ring hydrogenation as well as the overall TOF of the titania catalyst with no solvent effect on selectivity observed using the silica supported catalyst where ring hydrogenation was favored. For the titania catalyst, alkanes were found to favor ring hydrogenation whereas aromatics and alcohols led to carbonyl hydrogenation. A two-site catalyst model is proposed whereby the aromatic ring hydrogenation occurs over the metal sites while carbonyl hydrogenation is thought to occur predominantly at interfacial sites, with oxygen vacancies in the titania support activating the carbonyl. The effect of the solvent on the hydrogenation reaction over the titania catalyst was related to competition for the active sites between solvent and 4-phenyl-2-butanone.

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Preferential catalytic hydrogenation of aromatic compounds versus ketones with a palladium substituted polyoxometalate as pre-catalyst

Cited by 51 publications

References 22 publications

Transition Metal-Substituted Salt of Tungsten-Based Polyoxometalate-Supported Mesoporous Silica as a Catalyst for Organic Transformation Reactions

Transition Metal-Substituted Salt of Tungsten-Based Polyoxometalate-Supported Mesoporous Silica as a Catalyst for Organic Transformation Reactions

Noble Metals in Polyoxometalates

Effect of solvent on the hydrogenation of 4-phenyl-2-butanone over Pt based catalysts

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