Kinetic Site of Protonation in Transition Metal Clusters and Its Possible Relationship to Large Kinetic Deuterium Isotope Effects in Hydrogen Transfer Processes

1997 ◽  
Vol 16 (16) ◽  
pp. 3593-3596 ◽  
Author(s):  
Kirk R. Hash ◽  
Edward Rosenberg
Keyword(s):  
Transition Metal ◽  
Hydrogen Transfer ◽  
Metal Clusters ◽  
Isotope Effects ◽  
Transition Metal Clusters ◽  
Transfer Processes ◽  
Deuterium Isotope Effects

Competitive adsorption of phenol and toluene onto silica-supported transition metal clusters for biofuel purification

2021 ◽  
Author(s):  
Saber Gueddida ◽  
Michael Badawi ◽  
Tejraj Aminabhavi ◽  
Sébastien Lebègue
Keyword(s):  
Transition Metal ◽  
Competitive Adsorption ◽  
Metal Clusters ◽  
Hydrocarbon Fuel ◽  
Energy Performance ◽  
Transition Metal Clusters ◽  
Gas Emissions ◽  
Toxic Gas

Biomass-based renewable hydrocarbon fuel is a complex mix that contains many oxygenating substances, in particular phenolics, which leads to adverse consequences such as reduced engine energy performance and increased toxic gas emissions.

Bridging Aromatic/Antiaromatic Units. Recent Advances in Aromaticity and Antiaromaticity in Main‐group and Transition‐metal Clusters From Bonding and Magnetic analyses

2021 ◽  
Author(s):  
Nikolay V. Tkachenko ◽  
Ivan A. Popov ◽  
Maksim Kulichenko ◽  
Nikita Fedik ◽  
Zhong-Ming Sun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Clusters ◽  
Main Group ◽  
Transition Metal Clusters ◽  
Recent Advances

scholarly journals Resolution of Low-Energy States in Spin-Exchange Transition-Metal Clusters: Case Study of Singlet States in [Fe(III)4S4] Cubanes

2021 ◽  
Author(s):  
Giovanni Li Manni ◽  
Werner Dobrautz ◽  
Nikolay A. Bogdanov ◽  
Kai Guther ◽  
Ali Alavi
Keyword(s):  
Transition Metal ◽  
Metal Clusters ◽  
Spin Exchange ◽  
Low Energy ◽  
Transition Metal Clusters ◽  
Singlet States ◽  
Energy States

Soluble lanthanide-transition-metal clusters Ln36Co12 as effective molecular electrocatalysts for water oxidation

2021 ◽  
Vol 57 (29) ◽  
pp. 3611-3614
Author(s):  
Rong Chen ◽  
Chao-Long Chen ◽  
Ming-Hao Du ◽  
Xing Wang ◽  
Cheng Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Synergistic Effect ◽  
Water Oxidation ◽  
Metal Clusters ◽  
Bond Formation ◽  
Transition Metal Clusters ◽  
Oxidation Activity ◽  
Acidic Conditions ◽  
Effective Water

The stable 48-metal Ln36Co12 clusters show an effective water oxidation activity under weak acidic conditions because of the synergistic effect between lanthanide and transition metals in O–O bond formation.

Magnetic properties of free alkali and transition metal clusters

1991 ◽  
Vol 19 (1-4) ◽  
pp. 241-245 ◽  
Author(s):  
W. Heer ◽  
P. Milani ◽  
A. Ch�telain
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
Metal Clusters ◽  
Free Alkali ◽  
Transition Metal Clusters

Molecular orbital study of heterometallic M3C2 organo-transition-metal clusters: orientation of the alkyne moiety

1985 ◽  
Vol 24 (2) ◽  
pp. 218-224 ◽  
Author(s):  
Jean Francois Halet ◽  
Jean Yves Saillard ◽  
Roland Lissillour ◽  
Michael J. McGlinchey ◽  
Gerard Jaouen
Keyword(s):  
Transition Metal ◽  
Molecular Orbital ◽  
Metal Clusters ◽  
Transition Metal Clusters ◽  
Molecular Orbital Study ◽  
Orbital Study

Mechanism of initiation in the thermal polymerization of styrene. Kinetic deuterium isotope effects in the initiation step of the thermal polymerization of some deuterated styrenes

1969 ◽  
Vol 47 (21) ◽  
pp. 4049-4058 ◽  
Author(s):  
Karl R. Kopecky ◽  
Syamalarao Evani
Keyword(s):  
Hydrogen Transfer ◽  
Deuterium Oxide ◽  
Isotope Effects ◽  
Thermal Polymerization ◽  
Convenient Synthesis ◽  
Initiation Step ◽  
Deuterium Isotope Effects

A convenient synthesis of 2,6-dideuteriostyrene starts with N,N-dimethyl-(1-phenylethyl)-amine which is deuterated in the 2 and 6 positions by a series of exchanges using n-butyllithium followed by deuterium oxide. The deuterium isotope effects at 70° on the rates of the thermal polymerization, [Formula: see text], of 2,6-dideuterio-, α-deuterio-, and β,β-dideuteriostyrene are 1.29, 1.00, and 0.78, respectively. The deuterium isotope effects at 70° on the 2,2′-azobis-(2-methylpropionitrile) initiated rates of polymerization,[Formula: see text], are 0.96, 0.86, and 0.81, respectively. From these values the deuterium isotope effects on the rates of initiation of the thermal polymerization, k1H/k1D, are calculated to be 1.80, 1.31, and 0.92, respectively. At 147° the presence of 1.5% potassium t-butoxide decreases the rate of the thermal polymerization of neat styrene by a factor of 17, and results in the formation of 1-phenyltetralin as the greatly predominant dimer. The results support the suggestion that the thermal polymerization of styrene is initiated by hydrogen transfer from 1-phenyl-1,2,3,9-tetrahydronaphthalene, formed by a concerted dimerization of two molecules of styrene, to a third molecule of styrene.

Role of population analysis in LCAO-MO theory of transition-metal clusters

1975 ◽  
Vol 25 (11) ◽  
pp. 1201-1207 ◽  
Author(s):  
J. Málek ◽  
R. A. Evarestov ◽  
A. N. Ermoshkin ◽  
B. Hejda ◽  
K. Polák
Keyword(s):  
Transition Metal ◽  
Metal Clusters ◽  
Population Analysis ◽  
Transition Metal Clusters ◽  
Lcao Mo Theory ◽  
Lcao Mo ◽  
Mo Theory

Size-dependent properties of transition metal clusters: from molecules to crystals and surfaces – computational studies with the program ParaGauss

2015 ◽  
Vol 17 (43) ◽  
pp. 28463-28483 ◽  
Author(s):  
Thomas M. Soini ◽  
Notker Rösch
Keyword(s):  
Transition Metal ◽  
Metal Clusters ◽  
Scaling Relations ◽  
Computational Studies ◽  
Transition Metal Clusters ◽  
Size Dependent ◽  
Adsorption Complexes

Scaling relations on the basis of accurate DFT results are a useful tool for analyzing size-dependent properties of transition metal clusters and adsorption complexes on such systems.

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