Alkyne Hydrogenation Catalysis across a Family of Ga/In Layered Zintl Phases

2021 ◽  
Author(s):  
Kelsey L. Hodge ◽  
Joshua E. Goldberger
Keyword(s):  
Zintl Phases ◽  
Alkyne Hydrogenation ◽  
Hydrogenation Catalysis

Transition Metal-Free Alkyne Hydrogenation Catalysis with BaGa2, a Hydrogen Absorbing Layered Zintl Phase

2019 ◽  
Vol 141 (51) ◽  
pp. 19969-19972 ◽  
Author(s):  
Kelsey L. Hodge ◽  
Joshua E. Goldberger
Keyword(s):  
Transition Metal ◽  
Zintl Phase ◽  
Metal Free ◽  
Alkyne Hydrogenation ◽  
Hydrogenation Catalysis

Synthesis and characterization of ternary Zintl phases

1988 ◽  
Author(s):  
Weir-Mirn Hurng
Keyword(s):  
Synthesis And Characterization ◽  
Zintl Phases

scholarly journals Heterometallic Mg–Ba Hydride Clusters in Hydrogenation Catalysis

ChemCatChem ◽  
2021 ◽  
Author(s):  
Sjoerd Harder ◽  
Michael Wiesinger ◽  
Christian Knüpfer ◽  
Holger Elsen ◽  
Jonathan C. Mai ◽  
...  
Keyword(s):  
Hydrogenation Catalysis

scholarly journals Hydrogenation of alkynyl substituted aromatics over rhodium/silica

2021 ◽  
Author(s):  
Joseph W. Gregory ◽  
S. David Jackson
Keyword(s):  
Cascade Reactions ◽  
Activation Energies ◽  
Competitive Reaction ◽  
Fresh Catalyst ◽  
Hydrogen Flux ◽  
Rate Determining Step ◽  
Surface Hydrogen ◽  
Alkyne Hydrogenation ◽  
Competitive Hydrogenation ◽  
Styrene Hydrogenation

AbstractThe cascade reactions of phenylacetylene to ethylcyclohexane and 1-phenyl-1-propyne to propylcyclohexane were studied individually, under deuterium and competitively at 343 K and 3 barg pressure over a Rh/silica catalyst. Both systems gave similar activation energies for alkyne hydrogenation (56 ± 4 kJ mol−1 for phenylacetylene and 50 ± 4 kJ mol−1 for 1-phenyl-1-propyne). Over fresh catalyst the order of reactivity was styrene > phenylacetylene ≫ ethylbenzene. Whereas with the cascade hydrogenation starting with phenylacetylene, styrene hydrogenated much slower phenylacetylene even once all the phenylacetylene was hydrogenated. The activity of ethylbenzene was also reduced in the cascade reaction and after styrene hydrogenation. These reductions in rate were likely due to carbon laydown from phenylacetylene and styrene. Similar behavior was observed with the 1-phenyl-1-propyne cascade. Deuterium experiments revealed similar positive KIEs for phenylacetylene (2.6) and 1-phenyl-1-propyne (2.1). Ethylbenzene hydrogenation/deuteration gave a KIE of 1.6 obtained after styrene hydrogenation in contrast to the inverse KIE of 0.4 found with ethylbenzene hydrogenation/deuteration over a fresh catalyst, indicating a change in rate determining step. Competitive hydrogenation between phenylacetylene and styrene reduced the rate of phenylacetylene hydrogenation but increased selectivity to ethylbenzene suggesting a change in the flux of sub-surface hydrogen. In the competitive reaction between 1-phenyl-1-propyne and propylbenzene, the rate of hydrogenation of 1-phenyl-1-propyne was increased and the rate of alkene isomerization was decreased, likely due to an increase in the hydrogen flux for hydrogenation and a decrease in the hydrogen species active in methylstyrene isomerization.

ChemInform Abstract: Structure-Composition Sensitivity in “Metallic” Zintl Phases: A Study of Eu(Ga1-xTtx)2(Tt: Si, Ge, 0 ≤ x ≤ 1).

ChemInform ◽  
2009 ◽  
Vol 40 (48) ◽  
pp. no-no
Author(s):  
Tae-Soo You ◽  
Jing-Tai Zhao ◽  
Rainer Poettgen ◽  
Walter Schnelle ◽  
Ulrich Burkhardt ◽  
...  
Keyword(s):  
Zintl Phases ◽  
Abstract Structure

Is It Homogeneous or Heterogeneous Catalysis Derived from [RhCp*Cl2]2?In OperandoXAFS, Kinetic, and Crucial Kinetic Poisoning Evidence for Subnanometer Rh4Cluster-Based Benzene Hydrogenation Catalysis

2011 ◽  
Vol 133 (46) ◽  
pp. 18889-18902 ◽  
Author(s):  
Ercan Bayram ◽  
John C. Linehan ◽  
John L. Fulton ◽  
John A. S. Roberts ◽  
Nathaniel K. Szymczak ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Benzene Hydrogenation ◽  
Hydrogenation Catalysis

Doping a Single Palladium Atom into Gold Superatoms Stabilized by PVP: Emergence of Hydrogenation Catalysis

2017 ◽  
Vol 61 (1-2) ◽  
pp. 136-141 ◽  
Author(s):  
Shun Hayashi ◽  
Ryo Ishida ◽  
Shingo Hasegawa ◽  
Seiji Yamazoe ◽  
Tatsuya Tsukuda
Keyword(s):  
Palladium Atom ◽  
Hydrogenation Catalysis

scholarly journals Intermediate Yb valence in the Zintl phases Yb14MSb11(M=Zn,Mn,Mg) : XANES, magnetism, and heat capacity

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Allan He ◽  
Elizabeth L. Kunz Wille ◽  
Liane M. Moreau ◽  
Sean M. Thomas ◽  
Jon M. Lawrence ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Zintl Phases

Modular Attachment of Appended Boron Lewis Acids to a Ruthenium Pincer Catalyst: Metal–Ligand Cooperativity Enables Selective Alkyne Hydrogenation

2016 ◽  
Vol 138 (33) ◽  
pp. 10378-10381 ◽  
Author(s):  
Kuei-Nin T. Tseng ◽  
Jeff W. Kampf ◽  
Nathaniel K. Szymczak
Keyword(s):  
Lewis Acids ◽  
Catalyst Metal ◽  
Alkyne Hydrogenation ◽  
Metal Ligand

scholarly journals Molecular-Level Understanding of CeO2 as a Catalyst for Partial Alkyne Hydrogenation

2014 ◽  
Vol 118 (10) ◽  
pp. 5352-5360 ◽  
Author(s):  
Javier Carrasco ◽  
Gianvito Vilé ◽  
Delia Fernández-Torre ◽  
Rubén Pérez ◽  
Javier Pérez-Ramírez ◽  
...  
Keyword(s):  
Molecular Level ◽  
Alkyne Hydrogenation
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