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Showing 1 to 9 of 9 for “"Osmium Complexes"”.
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Osmium complexes as models for CO reduction intermediates
… and aspects of the chemistry, of carbon-donor complexes of osmium as organo-metallic models for CO reduction intermediates. In Chapter 1 some aspects of ligand reactivity of the carbon-donor ligands CO, CS, CSe, CTe and carbenes in transition metal complexes are reviewed. The reduction …
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Ruthenium and osmium complexes as catalyst precursors for Fischer-Tropsch synthesis
Ruthenium complexes of several types have been synthesized, supported on silica and their activity in CO hydrogenation was investigated in order to determine the cluster size of surface Ru atoms required for the formation of hydrocarbons. Previous studies have shown that more than one metallic site …
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Synthesis, Characterization, and Ring -Opening Metathesis Polymerization Activity of Pentamethylcyclopentadienyl Osmium Complexes
Several acetonitrile complexes have been prepared; among these are [Cp*Os(CH 3CN)3][PF6], [CP*Os(PPh3)2(CH 3CN)][PF6], and [Cp*Os(COD)(CH3CN)]-[PF6 ]. Addition of 1,3-cyclooctadiene to Cp*2Os2Br 4 in refluxing ethanol affords the allyl complex Cp*Os(eta 3-C8H13)Br2. Treatment of the dimethyl …
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Steric and Electronic Effects Induced by Ancillary Ligand Substitutions on Cyclopentadienyl Osmium Complexes
… variances, the molecular geometries of several osmium(II) and osmium(IV) complexes were investigated. (C5H5)Os(dmpm)Br reacts with NaOMe in refluxing methanol to afford the monohydride compound (C5H5)Os(dmpm)H, which can be protonated with HBF 4·Et2O to afford [(C5H5)Os(dmpm)H 2][BF4]. …
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Axial Ligand Studies in Iron Triad Metalloporphyrins
… of pyridine and imidazole iron, ruthenium and osmium complexes are structurally elucidated by x-ray crystallography. These structures have been elucidated for density functional calculations to derive solid state NMR spectra.
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Investigation of ligand misdirection using the kinetic element effect and the kinetic enthalpy effect.
Metal complexes were synthesized with the atropisomeric dabp. X-ray crystal structures were solved for [Ru(bipy)2(dabp)]2+ and [(eta6-C6H6)Ru(dabp)(Cl)]+. Only one diastereomer was observed for [Ru(bipy)2(dabp)] 2+ in the 1H NMR spectrum. Exchange was observed and measured for the ruthenium and …
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Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium
… dinuc1ear carbonyl compounds of ruthenium and osmium have been successfully prepared and characterised by various analytical and spectroscopic techniques. X-ray crystal structures have been determined for the osmium complexes [OS2(CO)4(p-02CCsH4FeCsHs)2L2] {L = PPh3 (102), py (103)}. Some of …
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Osmium alkane complexes: Synthesis, characterization, and isotopic labeling studies
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Stereochemical effects on intervalence charge transfer
… (IVCT) in di- and trinuclear mixed-valence complexes. The differential IVCT characteristics of the diastereoisomers of polypyridyl complexes of ruthenium and osmium offer a new and intimate probe of the fundamental factors that govern the extent of electronic delocalisation and the barrier …