Kinetic Studies on the Terminal Pyridine Exchange Reactions of Some Oxo-Acetate Bridged Trinuclear Ruthenium Complexes. Influence of the Metal Oxidation State and Non-Leaving Terminal Ligand (CO)

1992 ◽  
Vol 65 (5) ◽  
pp. 1411-1414 ◽  
Author(s):  
Masaaki Abe ◽  
Yoichi Sasaki ◽  
Akira Nagasawa ◽  
Tasuku Ito
Keyword(s):  
Oxidation State ◽  
Ruthenium Complexes ◽  
Kinetic Studies ◽  
Metal Oxidation ◽  
Exchange Reactions ◽  
Terminal Ligand

Voltammetric Studies of Some Novel Fe(III) Complexes with Quadridentate Ligands. The Axial Ligand-Exchange Reactions in DMF and DMSO

1995 ◽  
Vol 60 (7) ◽  
pp. 1140-1157 ◽  
Author(s):  
Ljiljana S. Jovanovic ◽  
Luka J. Bjelica
Keyword(s):  
Oxidation State ◽  
Chemical Reactions ◽  
Ligand Exchange ◽  
Kinetic Data ◽  
Central Atom ◽  
Axial Ligand ◽  
Exchange Reactions ◽  
Ligand Effect ◽  
Condensation Products ◽  
Voltammetric Studies

The electrochemistry of four novel Fe(III) complexes of the type [Fe(L)Cl], involving quadridentate ligands based on the condensation products of benzoylacetone-S-methylisothiosemicarbazone with salicylaldehyde, 5-chlorosalicylaldehyde, 3,5-dichlorosalicylaldehyde or 5-nitrosalicylaldehyde, was studied in DMF and DMSO at a GC electrode. All complexes undergo a two-step one-electron reductions, usually complicated by chemical reactions. In solutions containing Cl-, the ligand-exchange reactions Cl--DMF and Cl--DMSO take place. Stability of the chloride-containing complexes was discussed in terms of the coordinated ligand effect, oxidation state of the central atom and, in particular, of the donor effect of the solvent. Some relevant kinetic data were calculated.

scholarly journals Two-Dimensional, Hierarchical Ag-Doped TiO2 Nanocatalysts: Effect of the Metal Oxidation State on the Photocatalytic Properties

ACS Omega ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 2579-2587 ◽  
Author(s):  
Siti Khatijah Md Saad ◽  
Akrajas Ali Umar ◽  
Marjoni Imamora Ali Umar ◽  
Masahiko Tomitori ◽  
Mohd. Yusri Abd. Rahman ◽  
...  
Keyword(s):  
Oxidation State ◽  
Photocatalytic Properties ◽  
Two Dimensional ◽  
Metal Oxidation ◽  
Doped Tio2

Synthesis and characterisation of transition metal substituted barium hollandite ceramics

2006 ◽  
Vol 932 ◽  
Author(s):  
Neil C. Hyatt ◽  
Martin C. Stennett ◽  
Steven G. Fiddy ◽  
Jayne S. Wellings ◽  
Sian S. Dutton ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxidation State ◽  
Powder Diffraction ◽  
Single Phase ◽  
Maximum Density ◽  
Processing Conditions ◽  
Metal Oxidation ◽  
Exafs Data ◽  
X Ray ◽  
Oxygen Atoms

ABSTRACTA range of transition metal bearing hollandite phases, formulated Ba1.2B1.2Ti6.8O16 (B2+ = Mg, Co, Ni, Zn, Mn) and Ba1.2B2.4Ti5.6O16 (B3+ = Al, Cr, Fe) were prepared using an alkoxide - nitrate route. X-ray powder diffraction demonstrated the synthesis of single phase materials for all compositions except B = Mn. The processing conditions required to produce > 95 % dense ceramics were determined for all compositions, except B = Mg for which the maximum density obtained was > 93 %. Analysis of transition metal K-edge XANES data confirmed the presence of the targeted transition metal oxidation state for all compositions except B = Mn, where the overall oxidation state was found to be Mn3+. The K-edge EXAFS data of Ba1.2B1.2Ti6.8O16 (B = Ni and Co) were successfully analysed using a crystallographic model of the hollandite structure, with six oxygen atoms present in the first co-ordination shell at a distance of ca. 2.02Å. Analysis of Fe K-edge EXAFS data of Ba1.2B2.4Ti5.4O16 revealed a reduced co-ordination shell of five oxygens at ca. 1.99Å.

scholarly journals Studies of the Ruthenium Complexes. XIII. Kinetic Studies of Electrontransfer Reactions between Aquapentaammineruthenium(II) and Halopentaammineruthenium(III) Comlexes

1977 ◽  
Vol 50 (3) ◽  
pp. 666-669 ◽  
Author(s):  
Akira Ohyoshi ◽  
Kenichiro Yoshikuni ◽  
Hidetoshi Ohtsuyama ◽  
Tomohisa Yamashita ◽  
Shigeyoshi Sakaki
Keyword(s):  
Ruthenium Complexes ◽  
Kinetic Studies

scholarly journals Studies on the Ruthenium Complexes. IX. Kinetic Studies on the Deaquation-anation Reaction of Aquapentaammineruthenium(III) Complexes

1975 ◽  
Vol 48 (1) ◽  
pp. 262-265 ◽  
Author(s):  
Akira Ohyoshi ◽  
Shun-ichi Hiraki ◽  
Tomio Odate ◽  
Susumu Kohata ◽  
Junko Oda
Keyword(s):  
Ruthenium Complexes ◽  
Kinetic Studies ◽  
Anation Reaction

Performance of enhanced DuBois type water reduction catalysts (WRC) in artificial photosynthesis – effects of various proton relays during catalysis

2019 ◽  
Vol 215 ◽  
pp. 141-161 ◽  
Author(s):  
Wolfgang Viertl ◽  
Johann Pann ◽  
Richard Pehn ◽  
Helena Roithmeyer ◽  
Marvin Bendig ◽  
...  
Keyword(s):  
Oxidation State ◽  
Artificial Photosynthesis ◽  
Metal Oxidation ◽  
Water Reduction ◽  
Coordination Site ◽  
Proton Relay ◽  
Additional Coordination ◽  
Type Water ◽  
Reduction Catalysts

A pincer type ligand provides an additional coordination site or a proton relay depending on the metal oxidation state.

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