The redox behaviour of ferrocene derivatives

Zanello, Piero; Cinquantini, Arnaldo; Mangani, Stefano; Opromolla, Giuliana; Pardi, Luca; Janiak, Christoph; Rausch, Marvin D.

doi:10.1016/0022-328x(94)88122-7

Cited by 48 publications

(24 citation statements)

References 35 publications

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“…Unfortunately, while we were able to determine the connectivity for the cation in [Fe(η 5 ‐C 5 Bn 5 ) 2 ]PF 6 , the diffraction data were too weak to obtain any meaningful metrical information. On the other hand, the structure of [Fe(η 5 ‐C 5 Me 5 ) 2 ]BAr F was previously reported . The iron atoms are also well‐separated in this structure, with the nearest Fe⋅⋅⋅Fe distance being 9.6116 Å.…”

Section: Resultsmentioning

confidence: 53%

“…To reduce the possible effects of dipolar magnetic interactions on the magnetization dynamics, we chose to investigate ferrocenium complexes having bulky cyclopentadienyl ring substituents and/or large counterions, allowing the magnetic centers to be well‐separated in the solid state. Specifically, the bulky cyclopentadienyl ligands in [Fe(η 5 ‐C 5 Bn 5 ) 2 ]X (X=BF 4 − and PF 6 − ) and the large counterion in [Fe(η 5 ‐C 5 Me 5 ) 2 ]BAr F (BAr F = B(3,5‐(CF 3 ) 2 C 6 H 3 ) 4 − ) are expected to provide long Fe⋅⋅⋅Fe separations in the solid state (Scheme ).…”

Section: Introductionmentioning

confidence: 99%

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Magnetization Slow Dynamics in Ferrocenium Complexes

Ding

Hickey

Pink

et al. 2019

Chemistry A European J

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The single‐molecule magnet (SMM) properties of a series of ferrocenium complexes, [Fe(η5‐C5R5)2]+ (R=Me, Bn), are reported. In the presence of an applied dc field, the slow dynamics of the magnetization in [Fe(η5‐C5Me5)2]BArF are revealed. Multireference quantum mechanical calculations show a large energy difference between the ground and first excited states, excluding the commonly invoked, thermally activated (Orbach‐like) mechanism of relaxation. In contrast, a detailed analysis of the relaxation time highlights that both direct and Raman processes are responsible for the SMM properties. Similarly, the bulky ferrocenium complexes, [Fe(η5‐C5Bn5)2]BF4 and [Fe(η5‐C5Bn5)2]PF6, also exhibit magnetization slow dynamics, however an additional relaxation process is clearly detected for these analogous systems.

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Section: Resultsmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Magnetization Slow Dynamics in Ferrocenium Complexes

Ding

Hickey

Pink

et al. 2019

Chemistry A European J

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“…It is known that ferrocene exhibits a reversible one-electron transfer process in all of the investigated solvent media, for example, aprotic solvents and some of ionic liquids [45][46][47][48][49][50][51][52][53][54]. The E mp values were found to be strongly dependent on the solvent medium.…”

Section: Resultsmentioning

confidence: 99%

Novel paste electrodes based on phosphonium salt room temperature ionic liquids for studying the redox properties of insoluble compounds

Khrizanforov

Arkhipova

Shekurov

et al. 2015

J Solid State Electrochem

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A new carbon paste electrode is described, which contains the room temperature ionic liquid (RTIL) tri(tertbutyl)(dodecyl)phosphonium tetrafluoroborate as binder. The advantages of this electrode are a high conductivity, very wide electrochemical window (5.6 V from 2.7 to −2.9 V, one of the widest ever reported for RTILs), stability in time, and reproducibility. This RTIL-carbon paste electrode (CPE) allows determining the current-voltage characteristics of redoxactive compounds. Thus, the newly synthesized insoluble compound poly-tris(μ 2 -1,1′-ferrocenediylphenylhydrophosphinato-phenylphosphinato)-iron(III) tetrahydrofuran solvate {μ 2 -[Fe II (η 5 -C 5 H 4 -P(PhOO)(η 5 -C 5 H 4 -P(PhOOH))] 3 Fe III }·THF was studied, and a quasi-reversible three-electron oxidation could be observed at a potential more positive than that of ferrocene. A comparison of voltammograms on the paraffin-CPE and on the novel RTIL-CPE shows the advantages of the latter.

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“…The system Fc/Fc + was used as external standard. All redox potentials are referenced to SCE and were recalculated based on the system Fc/Fc + [28].…”

Section: Methodsmentioning

confidence: 99%