H/D Isotopic Exchange between Hydrogen and Water Vapour on Ni/Cr2O3/ThO2Catalysts

El-Nour, F. Abou; Belacy, N.; Abdel-Khalik, M.; Khalil, Tarek M.; Aly, H. F.

doi:10.1080/10256019008622421

Cited by 4 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The generation of D 2 from protic solvents such as CD 3 OD and D 2 O is a smart and environmentally friendly process that has been widely pursued in recent years. This process, which nature has solved with hydrogenases, , is currently only available for relatively few systems . Many of these applications give very low yields even under extreme conditions of temperature and pressure.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H₂ with CD₃OD

et al. 2012

View full text Add to dashboard Cite

The protonation with Brønsted acids HB (HBF 4 and CF 3 CO 2 H) of [RuH 2 (arene)(PPh 2 Het)] derivatives (PPh 2 Het = dpim, Het = 2-N-methylimidazolyl; PPh 2 Het = PPh 2 py, Het = 2-pyridyl) that contain uncoordinated N atoms has been analyzed experimentally by NMR spectroscopy and through computational studies. Initially, at low temperature, the uncoordinated N atoms of the phosphine are protonated and a proton−hydride exchange is observed by 1 H NMR spectroscopy. The proton transfer leads to the corresponding cationic trihydride intermediates, which exhibit a dual character of classical and nonclassical hydrides, with the nonclassical species being more stable, especially when Het = 2-pyridyl. In fact, the release of H 2 and the formation of the respective monohydride complexes [RuH(arene)(κ 2 -N,P-PPh 2 Het)]B was observed at room temperature. The participation of the uncoordinated N center in the proton transfer process in the stabilization of RuH(H 2 ) + with respect to RuH 3 + species and in the hydride−dihydrogen exchange (cis effect) are discussed. Calculations on the complex [RuH 3 (p-cymene)(PPh 3 )] + have also been carried out for the sake of comparison. A dual character was also found, but in this case the classical species is more stable. H/D exchange of the hydride ligands of the dihydride complexes, using CD 3 OD as the deuterium source, has been studied. The very rapid deuterium labeling of H 2 , catalyzed by the aforementioned dihydrides, has been observed. The known compound [RuH 2 (p-cymene)(PPh 3 )] is also active in this labeling process, and the possible mechanism for both the H/D exchange and the deuterium labeling of H 2 is discussed in light of theoretical studies.

show abstract

Section: Resultsmentioning

confidence: 99%

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H₂ with CD₃OD

et al. 2012

View full text Add to dashboard Cite

show abstract

Facile and Convenient Method of Deuterium Gas Generation Using a Pd/C‐Catalyzed H₂–D₂ Exchange Reaction and Its Application to Synthesis of Deuterium‐Labeled Compounds

Kurita

Aoki

Mizumoto

et al. 2008

Chemistry A European J

View full text Add to dashboard Cite

The Pd/C-catalyzed H(2)-D(2) exchange reaction using a H(2)-D(2)O combination provided a general, efficient and environmentally friendly route for the preparation of deuterium gas (D(2)). H(2) sealed in a reaction flask was converted into nearly pure D(2), which could be used for the Pd/C-catalyzed one-pot reductive deuteration of various reducible functionalities and the chemoselective one-pot deuterogenation of olefin and acetylene. Additionally, we established the capturing method of the generated D(2) in a balloon, which was successfully applied to the Pd/C-catalyzed reductive mono-N-alkylation of a primary amine using nitrile as the alkylating reagent.

show abstract

Heterogeneous Platinum Metal Catalyzed Deuterium Generation and Labeling Methods Using Hydrogen Gas and Deuterium Oxide as Key Reagents

Sajiki

2017

New Horizons of Process Chemistry

View full text Add to dashboard Cite

H/D Isotopic Exchange between Hydrogen and Water Vapour on Ni/Cr₂O₃/ThO₂Catalysts

Cited by 4 publications

References 6 publications

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H₂ with CD₃OD

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H₂ with CD₃OD

Facile and Convenient Method of Deuterium Gas Generation Using a Pd/C‐Catalyzed H₂–D₂ Exchange Reaction and Its Application to Synthesis of Deuterium‐Labeled Compounds

Heterogeneous Platinum Metal Catalyzed Deuterium Generation and Labeling Methods Using Hydrogen Gas and Deuterium Oxide as Key Reagents

Contact Info

Product

Resources

About

H/D Isotopic Exchange between Hydrogen and Water Vapour on Ni/Cr2O3/ThO2Catalysts

Cited by 4 publications

References 6 publications

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H2 with CD3OD

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H2 with CD3OD

Facile and Convenient Method of Deuterium Gas Generation Using a Pd/C‐Catalyzed H2–D2 Exchange Reaction and Its Application to Synthesis of Deuterium‐Labeled Compounds

Heterogeneous Platinum Metal Catalyzed Deuterium Generation and Labeling Methods Using Hydrogen Gas and Deuterium Oxide as Key Reagents

Contact Info

Product

Resources

About

H/D Isotopic Exchange between Hydrogen and Water Vapour on Ni/Cr₂O₃/ThO₂Catalysts

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H₂ with CD₃OD

Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H₂ with CD₃OD

Facile and Convenient Method of Deuterium Gas Generation Using a Pd/C‐Catalyzed H₂–D₂ Exchange Reaction and Its Application to Synthesis of Deuterium‐Labeled Compounds