Redox and spectral properties of the cis and trans isomers of the bis(2,2'-bipyridine)dioxoosmium(VI) perchlorate

Dobson, J. C.; Takeuchi, Kenneth J.; Pipes, David W.; Geselowitz, David B.; Meyer, Thomas J.

doi:10.1021/ic00234a017

Cited by 56 publications

(47 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…. [20] The UV/ Vis spectrum of [OsA C H T U N G T R E N N U N G (bpy) 2 A C H T U N G T R E N N U N G (CO 3 )] was in agreement with the literature. [19] (10 mL).…”

Section: Methodssupporting

confidence: 85%

“…Since the carbonate complex is hydrolyzed to the cis aqua complex, the pyridine and water ligands are likely to be in the cis configuration. [20] Details on the X-ray data acquisition and structure refinement of the working electrode was a glassy carbon (GC) electrode disk (Tokai) 3 mm in diameter, carefully polished and ultrasonically rinsed successively in absolute ethanol and dichloromethane before use. For scan rates above 0.1 V s À1 the working electrode was a 1 mm-diameter GC rod obtained by mechanical abrasion of the original 3 mm-diameter rod.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [Os^II(bpy)₂(py)(OH₂)]²⁺

et al. 2009

View full text Add to dashboard Cite

Successive oxidation of transition metal(II) aqua complexes (M(II)OH(2) to M(III)OH) is a domain in which proton-coupled electron transfer reactions are extremely common. The mechanism of these PCET reactions-concerted or stepwise-is an important issue in the understanding and design of natural or artificial systems catalyzing the formation of dioxygen by four-electron oxidation of water. Concerted proton-coupled electron transfer from an aqua metal(II) to a hydroxo metal(III) complex requires the close proximity of a proton-accepting group with a pK value between those of the aqua complexes. Otherwise, stepwise electron-proton or proton-electron pathways involving high-energy intermediates are followed. Concerted proton-electron pathways involving water as proton-acceptor or proton-donor group are inefficient. Cyclic voltammetry of the title complex in buffered aqueous solution and re-examination of previous results for the same complex attached to an electrode surface are used to establish these conclusions, which provide a starting point on the route to higher degrees of oxidation, such as those involved in the catalysis of water oxidation.

show abstract

“…. [20] The UV/ Vis spectrum of [OsA C H T U N G T R E N N U N G (bpy) 2 A C H T U N G T R E N N U N G (CO 3 )] was in agreement with the literature. [19] (10 mL).…”

Section: Methodssupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [Os^II(bpy)₂(py)(OH₂)]²⁺

et al. 2009

View full text Add to dashboard Cite

show abstract

“…4C) was earlier proposed by Molina-Svendsen et al [10] based on CID experiments, which agrees with the known solution and solid-state properties of osmium compounds. Actually, the [Os VI (bipy) 2 (O) 2 ] 2+ cation is known from X-ray crystallography of the complex [Os(bipy) 2 (O) 2 ]·(ClO 4 ) 2 [24].…”

Section: Binding Motifsmentioning

confidence: 99%

Binding of molecular oxygen and alkenes to coordinatively unsaturated bipyridinium metal complexes in the gas phase

Nielsen

Øiestad

Bojesen

et al. 2005

International Journal of Mass Spectrometry

View full text Add to dashboard Cite

“…Em suma, as características inerentes a cada série isomérica investigada permitem que os complexos sejam caracterizados e tenham as suas propriedades analisadas pelas mais variadas combinações de técnicas. Além da espectroscopia de absorção na região do infravermelho e de ressonância magnética multinuclear, que são sobejamente usadas [59][60][61][62][63][64][65] , podemos citar também dados extraídos de espectroscopia Raman 2 , espectroscopia de absorção na região do ultravioleta/visível 66 , espectroscopia de massa 67 , análise térmica 68,69 , ressonância paramagnética eletrônica 37 , voltametria cíclica 34,57 e técnicas de raios X 11,70 , como de grande valia na distinção entre isômeros geométricos e no estudo das propriedades dos mesmos. Obviamente algumas destas técnicas são usadas para soluções, enquanto outras fazem uso da amostra no estado sólido.…”

Section: Algumas Técnicas Usadas Na Elucidação De Estruturas De Isômeunclassified

Isomerismo cis-trans: de Werner aos nossos dias

Queiroz¹,

Batista²

1998

Quím. Nova

View full text Add to dashboard Cite

Recebido em 17/9/96; aceito em 17/9/97 CIS-TRANS ISOMERISM: FROM WERNER TO THE PRESENT DAYS: In coordination chemistry the study of geometrical isomerization and reactivity of specific isomers is a topic of major importance. The preparation of specific isomers often requires considerable complexity, and it is important to acquire a sense of what is involved in studying isomerism in laboratory. If it is difficult sometimes to prepare pure isomers, it is not easier to understand the mechanisms of isomerization reactions since studies on this subject have shown conflicting results and diferent interpretations on the same system have been reported in the literature. Although cis-trans isomerism in octahedral metal complexes is a common occurrence, there are relatively few studies reporting how these isomerizations occur. This paper gives an overview on cis-trans isomerization processes and identification of these species.

show abstract

Redox and spectral properties of the cis and trans isomers of the bis(2,2'-bipyridine)dioxoosmium(VI) perchlorate

Cited by 56 publications

References 0 publications

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [Os^II(bpy)₂(py)(OH₂)]²⁺

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [Os^II(bpy)₂(py)(OH₂)]²⁺

Binding of molecular oxygen and alkenes to coordinatively unsaturated bipyridinium metal complexes in the gas phase

Isomerismo cis-trans: de Werner aos nossos dias

Contact Info

Product

Resources

About

Redox and spectral properties of the cis and trans isomers of the bis(2,2'-bipyridine)dioxoosmium(VI) perchlorate

Cited by 56 publications

References 0 publications

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [OsII(bpy)2(py)(OH2)]2+

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [OsII(bpy)2(py)(OH2)]2+

Binding of molecular oxygen and alkenes to coordinatively unsaturated bipyridinium metal complexes in the gas phase

Isomerismo cis-trans: de Werner aos nossos dias

Contact Info

Product

Resources

About

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [Os^II(bpy)₂(py)(OH₂)]²⁺

Concerted and Stepwise Proton‐Coupled Electron Transfers in Aquo/Hydroxo Complex Couples in Water: Oxidative Electrochemistry of [Os^II(bpy)₂(py)(OH₂)]²⁺