Nickel Complexes of Carboxylate-Containing Polydentate Ligands as Models for the Active Site of Urease

2004 ◽  
Vol 43 (26) ◽  
pp. 8252-8262 ◽  
Author(s):  
Håkan Carlsson ◽  
Matti Haukka ◽  
Azzedine Bousseksou ◽  
Jean-Marc Latour ◽  
Ebbe Nordlander
Keyword(s):  
Active Site ◽  
Nickel Complexes ◽  
Polydentate Ligands

Hydrolytically Active Tetranuclear Nickel Complexes with Structural Resemblance to the Active Site of Urease

2002 ◽  
Vol 41 (20) ◽  
pp. 4981-4983 ◽  
Author(s):  
Håkan Carlsson ◽  
Matti Haukka ◽  
Ebbe Nordlander
Keyword(s):  
Active Site ◽  
Nickel Complexes ◽  
Structural Resemblance

Structural Models for the Active Site of Acetyl-CoA Synthase: Synthesis of Dinuclear Nickel Complexes Having Thiolate, Isocyanide, and Thiourea on the NipSite

2009 ◽  
Vol 48 (3) ◽  
pp. 1250-1256 ◽  
Author(s):  
Mikinao Ito ◽  
Mai Kotera ◽  
Yumei Song ◽  
Tsuyoshi Matsumoto ◽  
Kazuyuki Tatsumi
Keyword(s):  
Active Site ◽  
Nickel Complexes ◽  
Structural Models ◽  
Acetyl Coa

Cationic and Anionic Dinuclear Nickel Complexes [Ni(N2S2)Ni(dtc)]n(n=−1, +1) Modeling the Active Site of Acetyl-CoA Synthase

2009 ◽  
Vol 38 (2) ◽  
pp. 184-185 ◽  
Author(s):  
Yumei Song ◽  
Mikinao Ito ◽  
Mai Kotera ◽  
Tsuyoshi Matsumoto ◽  
Kazuyuki Tatsumi
Keyword(s):  
Active Site ◽  
Nickel Complexes ◽  
Acetyl Coa

Dinickel complexes of disubstituted benzoate polydentate ligands: mimics for the active site of urease

2008 ◽  
pp. 2538 ◽  
Author(s):  
Way-Zen Lee ◽  
Huan-Sheng Tseng ◽  
Meng-Yu Ku ◽  
Ting-Shen Kuo
Keyword(s):  
Active Site ◽  
Polydentate Ligands

scholarly journals Thiolate-bridged dinuclear iron(tris-carbonyl)-nickel complexes relevant to the active site of [NiFe] hydrogenase

2008 ◽  
Vol 105 (22) ◽  
pp. 7652-7657 ◽  
Author(s):  
Y. Ohki ◽  
K. Yasumura ◽  
K. Kuge ◽  
S. Tanino ◽  
M. Ando ◽  
...  
Keyword(s):  
Active Site ◽  
Nickel Complexes ◽  
Carbonyl Nickel ◽  
Dinuclear Iron

Locating Al in the DABCO catalyst before and after Al extraction

1990 ◽  
Vol 48 (4) ◽  
pp. 265-267
Author(s):  
Kathleen B. Reuter
Keyword(s):  
Active Site ◽  
Inverse Relationship ◽  
Transverse Direction ◽  
Reaction Rate ◽  
Acid Phosphate ◽  
Fracture Surfaces ◽  
Al Content ◽  
Before And After ◽  
Relationship Of

The reaction rate and efficiency of piperazine to 1,4-diazabicyclo-octane (DABCO) depends on the Si/Al ratio of the MFI topology catalysts. The Al was shown to be the active site, however, in the Si/Al range of 30-200 the reaction rate increases as the Si/Al ratio increases. The objective of this work was to determine the location and concentration of Al to explain this inverse relationship of Al content with reaction rate.Two silicalite catalysts in the form of 1/16 inch SiO2/Al2O3 bonded extrudates were examined: catalyst A with a Si/Al of 83; and catalyst B, the acid/phosphate Al extracted form of catalyst A, with a Si/Al of 175. Five extrudates from each catalyst were fractured in the transverse direction and particles were obtained from the fracture surfaces near the center of the extrudate diameter. Particles were also obtained from the outside surfaces of five extrudates.

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