Protonolysis Reactions of [(Me3Si)2N]3Ln(μ-Cl)Li(thf)3 withtBuSH or EtSH: Isolation, Structures and Catalytic Properties of Dinuclear Complexes [{(Me3Si)2N}2Ln(μ-StBu)]2 and Tetranuclear Complexes [Li(thf)4][{(Me3Si)2N}4Ln4(μ4-SEt)(μ-SEt)8] (Ln = Pr, Sm)

2007 ◽  
Vol 2007 (13) ◽  
pp. 1889-1896 ◽  
Author(s):  
Mei-Ling Cheng ◽  
Hong-Xi Li ◽  
Wen-Hua Zhang ◽  
Zhi-Gang Ren ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Dinuclear Complexes ◽  
Tetranuclear Complexes

Structural study of mono-, di- and tetranuclear complexes of the {Re(CO)3}+ fragment with thiosemicarbazone/thiosemicarbazonate ligands containing benzothiazole or benzoxazole groups

CrystEngComm ◽  
2018 ◽  
Vol 20 (33) ◽  
pp. 4781-4792 ◽  
Author(s):  
Arantxa Pino-Cuevas ◽  
Ana Graña ◽  
Ulrich Abram ◽  
Rosa Carballo ◽  
Ezequiel M. Vázquez-López
Keyword(s):  
Structural Study ◽  
Dinuclear Complexes ◽  
Bidentate Ligands ◽  
Tetranuclear Complex ◽  
Tetranuclear Complexes

Thiosemicarbazone form mononuclear and dinuclear complexes as bidentate ligands with {Re(CO)3}+ and a tetranuclear complex with unusual bideprotonated thiosemicarbazonate.

Chemistry and catalytic properties of oxidized rhodium chlorocarbonyl complexes, Rh4Cl4(CO)4(O2)2P2; P = tertiary phosphine ligands

1978 ◽  
Vol 56 (15) ◽  
pp. 1965-1969 ◽  
Author(s):  
William R. Cullen ◽  
Brian R. James ◽  
Giorgio Stukul
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Catalytic Hydrogenation ◽  
Catalytic Properties ◽  
Phosphine Ligands ◽  
Carbon Dioxide Evolution ◽  
Tertiary Phosphine ◽  
Tetranuclear Complexes

The reactions of the title complexes Rh4Cl4(CO)4(O2)2P2 (where P is a tertiary phosphine type ligand, in particular diphenylisobutylphosphinite) with both dihydrogen and carbon monoxide were studied in solution in the absence and presence of excess P. The reaction stoichiometries, particularly a measured carbon dioxide evolution, confirm the formulation of the reactant tetranuclear complexes. The complexes are effective for catalytic hydrogenation and hydroformylation of olefinic substrates, and the nature of the active catalysts is considered.

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

Electron distribution change of small nickel particles encaged in X zeolite in presence of Ce3+ ions, related to their catalytic properties

1986 ◽  
Vol 83 ◽  
pp. 619-621 ◽  
Author(s):  
F. Vergand ◽  
B. Iraqi ◽  
C. Bonnelle ◽  
E. Ramaroson ◽  
M.F. Guilleux ◽  
...  
Keyword(s):  
Electron Distribution ◽  
Catalytic Properties ◽  
Distribution Change ◽  
Nickel Particles ◽  
X Zeolite

DV-Xα calculations on some metallacyclopentadienyl dinuclear complexes

1989 ◽  
Vol 86 ◽  
pp. 841-846 ◽  
Author(s):  
Maurizio Casarin ◽  
Gaetano Granozzi
Keyword(s):  
Dinuclear Complexes
Sign in / Sign up

Export Citation Format

Share Document