- Hydrogenation of naphthalene and anthracene on Pt/C catalysts
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Hydrogenation of naphthalene and anthracene deposited on Sibunit and active carbon was studied. The reactions were carried out at a temperature of 280 °C and a pressure of 90 atm. The directions for the complete hydrogenation of the investigated substrates were studied. Correlations between the structures of naphthalene and anthracene and their activity in hydrogen absorption are presented. The hydrogenation rates decrease as the substrate is saturated with hydrogen.
- Kalenchuk,Koklin,Bogdan,Kustov
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p. 1406 - 1411
(2018/10/31)
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- Hydrogenation of Anthracene and Dehydrogenation of Perhydroanthracene on Pt/C Catalysts
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The hydrogenation of anthracene on a heterogeneous catalyst containing 3 wt % Pt/C (Aldrich) at 215, 245, and 280°C and the pressures of 40 and 90 atm is studied. The hydrogenation of anthracene to a completely hydrogenated product is considered in detail
- Kalenchuk,Koklin,Bogdan,Lunin
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p. 663 - 668
(2018/04/12)
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- Hydrogenation of Condensed Aromatic Compounds over Mesoporous Bifunctional Catalysts Following a Diels-Alder Adduct Pathway
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Pt(0.5 wt %)-Al-SBA-15 and Pt(0.5 wt %)-Al-MCM-41 bifunctional catalysts were prepared by wet impregnation and investigated in the hydrogenation of anthracene and the hydrogenolysis/hydrogenation of a series of synthesized Diels-Alder adducts with anthracene and anthracene derivatives. The mesoporous texture of the investigated catalysts allowed the hydrogenation of these substrates to a large extent. In direct correlation with the size of the Pt particles, Pt-Al-SBA-15 exhibited a higher activity. Both catalysts exhibited a strong Lewis acidity associated with the presence of the Al extra-framework species. The acidity of these catalysts afforded the esterification of the reaction byproduct, that is, succinic anhydride, with methanol or ethanol, and the hydrocracking/decyclization of one hydrogenated ring to lead to 1,2,3,4-tetrahydronaphthalene derivatives. A good correlation with the calculated values of the reaction Gibbs free energy has been evidenced.
- Huyen, Pham Thanh,Krivec, Marko,Ko?evar, Marijan,Bucur, Ioana C.,Rizescu, Cristina,Parvulescu, Vasile I.
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p. 1146 - 1156
(2016/04/05)
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- Selective catalytic hydrogenation of polycyclic aromatic hydrocarbons promoted by ruthenium nanoparticles
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Ru nanoparticles stabilised by PPh3 are efficient catalysts for hydrogenation of polycyclic aromatic hydrocarbons (PAHs) containing 2-4 rings under mild reaction conditions. These compounds were partially hydrogenated with good to excellent selectivities just by optimizing the reaction conditions. The influence of the nature of substituents present in different positions of naphthalene on the selectivity of hydrogenation was also studied. Hydrogenation of products containing substituents at position 1 is slower than that of products containing substituents at position 2. In all cases, hydrogenation takes place mainly on the less substituted ring.
- Bresó-Femenia, Emma,Chaudret, Bruno,Castillón, Sergio
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p. 2741 - 2751
(2015/05/27)
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- Facile sonochemical synthesis of carbon nanotube-supported bimetallic Pt-Rh nanoparticles for room temperature hydrogenation of arenes
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Bimetallic Pt-Rh nanoparticles can be deposited uniformly on surfaces of carboxylate functionalized multi-walled carbon nanotubes (MWNTs) using a simple one-step sonochemical method. The bimetallic nanoparticle catalyst exhibits a strong synergistic effect relative to the individual Pt or Rh metal nanoparticles for catalytic hydrogenation of polycyclic aromatic hydrocarbons (PAHs), neat benzene and alkylbenzenes. Complete ring saturation of PAHs can be achieved using the bimetallic Pt-Rh/MWNTs catalyst at room temperature. This one-step synthesis technique provides a simple and rapid way of making highly active and recyclable CNT-supported monometallic and bimetallic nanocatalysts for low temperature hydrogenation reactions.
- Pan, Horng-Bin,Wai, Chien M.
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scheme or table
p. 1649 - 1660
(2011/10/08)
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- Reduction of Polycyclic Arenes by BH Boranes, III. Partial Hydrogenation: From Anthracene to Coronene
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Tetrapropyldiboran(6) (TPDB) katalysiert die Hydrierung polycyclischer Arene unter Wasserstoff-Druck bei bei 200 deg C.In einigen Faellen koennen sehr hohe Ausbeuten an Hydroarenen erzielt werden .Neben unterschiedlichen kleinen Mengen an Perhydroarenen bilden sich nach langer Reaktionszeit aus saemtlichen Arenen auch C-C-Spaltungsprodukte.
- Yalpani, Mohamed,Koester, Roland
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p. 719 - 724
(2007/10/02)
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- Formation of 6,6'-(Butane-1,4-diyl)bis(1,2,3,4-tetrahydronaphthalene) in the Reaction of Tetralin with Aluminium Chloride
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It has been shown that the reaction of aluminium chloride with tetralin yields 6,6'-(butane-1,4-diyl)-bis(1,2,3,4-tetrahydronaphthalene) as well as a number of other products.It is suggested that this compound is formed by protonation of tetralin, fragmentation of the alicyclic ring and then electrophilic attack of a further tetralin molecule.The positions of substitution in the product suggests that ion pairs are involved in the reaction.It is clear that intermediates have sufficient lifetime to undergo intermolecular substitution reactions in addition to intramolecular substitution or proton loss.
- Wilson, Michael A.,Rottendorf, Horst,Collin, Philip J.,Vasallo, Anthony M.
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p. 2379 - 2383
(2007/10/02)
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