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Full-Text Articles in Inorganic Chemistry
Electrochemical Investigation Of The Kinetics Of Chloride Substitution Upon Reduction Of [Ru(Porphyrin)(No)Cl] Complexes In Thf., Jeremy R. Zink, E G. Abucayon, Anthony R. Ramuglia, Arghavan Fadamin, James E. Eilers, George B. Richter-Addo, Michael J. Shaw
Electrochemical Investigation Of The Kinetics Of Chloride Substitution Upon Reduction Of [Ru(Porphyrin)(No)Cl] Complexes In Thf., Jeremy R. Zink, E G. Abucayon, Anthony R. Ramuglia, Arghavan Fadamin, James E. Eilers, George B. Richter-Addo, Michael J. Shaw
SIUE Faculty Research, Scholarship, and Creative Activity
The electrochemistry of several ruthenium porphyrin nitrosyl chloride complexes [Ru(por)(NO)Cl] have been examined in tetrahydrofuran. The complexes undergo 1-electron irreversible reductions which result in the diffusion-limited substitutions of the chloride ligands for THF. This chloride metathesis is reversible in the presence of added NBu4Cl, and equilibrium constants and rate constants for chloride loss have been estimated. These parameters correlate with the NO stretching frequencies of the parent complexes, with more electron-donating porphyrin ligands favouring chloride loss from the reduced complexes. The [Ru(por)(NO)(THF)] products of the reductions can be detected by IR, EPR and visible spectroscopies. These species undergo …
Synthesis, Structural Characterization And Catalytic Activity Of Indenyl Complexes Of Ruthenium Bearing Fluorinated Phosphine Ligands, Matthew J. Stark, Michael J. Shaw, Arghavan Fadamin, Nigam P. Rath, Eike B. Bauer
Synthesis, Structural Characterization And Catalytic Activity Of Indenyl Complexes Of Ruthenium Bearing Fluorinated Phosphine Ligands, Matthew J. Stark, Michael J. Shaw, Arghavan Fadamin, Nigam P. Rath, Eike B. Bauer
SIUE Faculty Research, Scholarship, and Creative Activity
The synthesis, characterization and catalytic activity of new ruthenium complexes of fluorinated triarylphosphines is described. The new ruthenium complexes [RuCl(ind)(PPh3){P(p-C6H4CF3)3}] and [RuCl(ind)(PPh3){P(3,5-C6H3(CF3)2)3}] were synthesized in 57% and 24% isolated yield, respectively, by thermal ligand exchange of [RuCl(ind)(PPh3)2], where ind = indenyl ligand η5-C9H7−. The electronic and steric properties of the new complexes were studied through analysis of the X-ray structures and through cyclic voltammetry. The …
Over Or Under: Hydride Attack At The Metal Versus The Coordinated Nitrosyl Ligand In Ferric Nitrosyl Porphyrins., E G. Abucayon, R L. Khade, D R. Powell, Michael J. Shaw, Y Yang, G B. Richter-Addo
Over Or Under: Hydride Attack At The Metal Versus The Coordinated Nitrosyl Ligand In Ferric Nitrosyl Porphyrins., E G. Abucayon, R L. Khade, D R. Powell, Michael J. Shaw, Y Yang, G B. Richter-Addo
SIUE Faculty Research, Scholarship, and Creative Activity
Hydride attack at a ferric heme–NO to give an Fe–HNO intermediate is a key step in the global N--‐cycle. We demonstrate differential reactivity when six--‐ and five--‐coordinate ferric heme--‐NO models react with hydride. Although Fe–HNO formation is thermodynamically favored from this reaction, Fe–H formation is kinetically favored for the 5C case.
Synthesis, Structural Characterization And Catalytic Activity Of Indenyl Tris-N-Pyrrolyl Phosphine Complexes Of Ruthenium, Matthew J. Stark, Michael J. Shaw, Nigam P. Rath, Eike B. Bauer
Synthesis, Structural Characterization And Catalytic Activity Of Indenyl Tris-N-Pyrrolyl Phosphine Complexes Of Ruthenium, Matthew J. Stark, Michael J. Shaw, Nigam P. Rath, Eike B. Bauer
SIUE Faculty Research, Scholarship, and Creative Activity
The synthesis, characterization and catalytic activity of new ruthenium complexes of the tris-N-pyrrolyl phosphine ligand P(pyr)3 is described. The new ruthenium complexes [RuCl(ind)(PPh3){P(pyr)3}] and [RuCl(ind){P(pyr)3}2] (ind = indenyl ligand η5-C9H7−) were synthesized in 73% and 63% isolated yield, respectively, by thermal ligand exchange of [RuCl(ind)(PPh3)2] with P(pyr)3. The electronic and steric properties of the new complexes were studied through analysis of the X-Ray structures and through cyclic voltammetry. The new complexes [RuCl(ind)(PPh3){P(pyr)3}] and [RuCl(ind){P(pyr)3}2] and the known complex [RuCl(ind)(PPh3)2}] differed only slightly in their steric properties, as seen from the comparable bond lengths and angles around the ruthenium …
Preparation, Characterization, Electrochemistry, And Infrared Spectroelectrochemistry Of Ruthenium Nitrosyl Porphyrins Containing Η1-O Bonded Axial Carboxylates, Dennis Awasabisah, Nan Xu, Krishna P. Sharmah-Gautam, Douglas R. Powell, Michael J. Shaw, George B. Richter-Addo
Preparation, Characterization, Electrochemistry, And Infrared Spectroelectrochemistry Of Ruthenium Nitrosyl Porphyrins Containing Η1-O Bonded Axial Carboxylates, Dennis Awasabisah, Nan Xu, Krishna P. Sharmah-Gautam, Douglas R. Powell, Michael J. Shaw, George B. Richter-Addo
SIUE Faculty Research, Scholarship, and Creative Activity
The synthesis, characterization and redox behavior of eight low-spin nitrosyl carboxylate compounds (por)Ru(NO)(η1-OC(=O)R) (por = T(p-OMe)PP: R = Me (1), i-Pr (2), t-Bu (3), p-C6H4NO2 (4), Fc (5), CF3 (8); por = TTP: R = Fc (6)) and (T(p-OMe)PP)Ru(NO)(OC6HF4) (7) are reported. The compounds are moderately stable in air as solids. Their IR (KBr) spectral data show ʋNO's in the 1839-1861 range cm-1. The X-ray crystal structures of compounds 1 …