The Synthesis and Application of Anchored Catalysts in Hydrogen Isotope Exchange Systems. D2 – Protic Solvent Exchange

1974 ◽  
Vol 52 (17) ◽  
pp. 3000-3007 ◽  
Author(s):  
Graeme Strathdee ◽  
Russell Given
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Specific Activity ◽  
Homogeneous Catalyst ◽  
Protic Solvent ◽  
Solvent Exchange ◽  
Hydrogen Isotope Exchange ◽  
Wilkinson’S Catalyst ◽  
Specific Activities ◽  
Wilkinson's Catalyst

A number of polymer-attached, or anchored, catalysts of rhodium and ruthenium have been synthesized, and their activities for D2 exchange with ethanol have been measured. Among the rhodium anchored catalysts, three exhibited specific activity comparable to Wilkinson's catalyst, RhCl(PPh3)3. No polymer-attached ruthenium species had specific activities close to that of the active homogeneous catalyst RuCl2(PPh3)3. Conditions for the synthesis and optimum loading of complexing resins are discussed. Structural and kinetic comparisons are made between anchored catalysts and their homogeneous analogs.

Homogeneous Catalysis of Hydrogen Isotope Exchange between D2 and Ethanol by Dichlorotris(triphenylphosphine) Ruthenium(II)

1975 ◽  
Vol 53 (10) ◽  
pp. 1402-1409 ◽  
Author(s):  
Graeme Strathdee ◽  
Russell Given
Keyword(s):  
Activation Energy ◽  
Apparent Activation Energy ◽  
Homogeneous Catalysis ◽  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Homogeneous Catalyst ◽  
Hydrogen Isotope Exchange ◽  
Temperature Range

Rates of D2–ethanol exchange catalyzed by solutions of dichlorotris(triphenylphosphine) ruthenium(II) in 1:1 benzene–ethanol are reported as a function of the concentrations of ruthenium, deuterium, triphenylphosphine, and HCl. The rates were extremely fast, and approached 10−3 mol D2 l−1 s−1 at 333 K with 1.3 mmol/l Ru. Over the temperature range 263 to 303 K, the apparent activation energy was 85 kJ/mol. The kinetics have been interpreted in terms of a mechanism in which activation of D2 by RuCl2L3 is rate-controlling. A comparison is made between the characteristics of this homogeneous catalyst and those of the related RhClL3.

scholarly journals Are rate and selectivity correlated in iridium-catalysed hydrogen isotope exchange reactions?

2021 ◽  
Author(s):  
Daria S. Timofeeva ◽  
David M Lindsay ◽  
W. J. Kerr ◽  
David James Nelson
Keyword(s):  
Functional Groups ◽  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Reaction Rate ◽  
Exchange Reactions ◽  
Reaction Selectivity ◽  
Hydrogen Isotope Exchange ◽  
The Relationship

Herein we examine the relationship between reaction rate and reaction selectivity in iridium-catalysed hydrogen isotope exchange (HIE) reactions directed by Lewis basic functional groups. We have recently develped a directing...

Hydrogen isotope exchange between D2 and H2O catalyzed by platinum plate

1989 ◽  
Vol 67 (5) ◽  
pp. 857-861 ◽  
Author(s):  
Shin-Ichi Miyamoto ◽  
Tetsuo Sakka ◽  
Matae Iwasaki
Keyword(s):  
Kinetic Model ◽  
Exchange Reaction ◽  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Reaction Rate ◽  
Hydrogen Adsorption ◽  
Platinum Catalyst ◽  
Isotope Exchange Reaction ◽  
Hydrogen Isotope Exchange ◽  
Supported Platinum

The reaction rate of hydrogen isotope exchange between D2 and H2O catalyzed by platinum plate is studied. The exchange reaction is described with the kinetic model which is the modification of that for the exchange reaction catalyzed by alumina-supported platinum catalyst. For the comparison of experimental results with this model relative amount of the number of sites for hydrogen adsorption was estimated from the initial rate of hydrogen isotope exchange between H2 and D2 on the same surface. The results show that the kinetic model is applicable for the plate catalyst if the number of the sites for hydrogen absorption, which is very sensitive to the surface state of the catalyst, was estimated not from the macroscopic surface area but from our scheme. Keywords: hydrogen isotope exchange reaction, platinum plate as catalyst.

Two-film effects on the kinetics of hydrogen isotope exchange between CHCl3 and D2O in two liquid phase system

1993 ◽  
Vol 25 (5) ◽  
pp. 363-374
Author(s):  
Matae Iwasaki ◽  
Tetsuo Sakka ◽  
Shigeyuki Ohashi ◽  
Yoshikazu Miyake ◽  
Hiroshi Matsushita
Keyword(s):  
Liquid Phase ◽  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Phase System ◽  
Hydrogen Isotope Exchange ◽  
Kinetics Of

scholarly journals Highly active iridium(i) complexes for catalytic hydrogen isotope exchange

2008 ◽  
pp. 1115 ◽  
Author(s):  
Jack A. Brown ◽  
Stephanie Irvine ◽  
Alan R. Kennedy ◽  
William J. Kerr ◽  
Shalini Andersson ◽  
...  
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Hydrogen Isotope Exchange ◽  
Highly Active ◽  
Catalytic Hydrogen

Ortho-Deuteration of Aromatic Aldehydes via a Transient Directing Group-Enabled Pd-Catalyzed Hydrogen Isotope Exchange

2021 ◽  
Vol 86 (19) ◽  
pp. 13350-13359
Author(s):  
Junhua Kong ◽  
Zhi-Jiang Jiang ◽  
Jiayuan Xu ◽  
Yan Li ◽  
Hong Cao ◽  
...  
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Aromatic Aldehydes ◽  
Hydrogen Isotope Exchange ◽  
Directing Group

scholarly journals Hydrogen isotope exchange in tungsten during annealing in hydrogen atmosphere

2019 ◽  
Vol 59 (2) ◽  
pp. 026016 ◽  
Author(s):  
T. Ahlgren ◽  
P. Jalkanen ◽  
K. Mizohata ◽  
V. Tuboltsev ◽  
J. Räisänen ◽  
...  
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Hydrogen Atmosphere ◽  
Hydrogen Isotope Exchange
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