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- Title
Interactions Between Two Cobalt Salen Centers Bridged by Non‐Conjugated Linkers**.
- Authors
Speiser, Bernd; Zitzer, Georg
- Abstract
Tetra‐tert‐butyl‐Co(salen), an amido‐substituted derivative and a series of bis(salen) complexes of cobalt(II) with the two metal centers bridged by flexible, non‐conjugated bis‐amido linkers are investigated by cyclic voltammetry, chronoamperometry, and differential pulse voltammetry in four electrolytes (acetonitrile or dichloromethane, conventional or weakly coordinating anion). Cyclic voltammograms are analyzed by simulation based on E or EE mechanisms. The compounds are characterized by formal potentials E0 , diffusion coefficients D and number of electrons transferred, n. Differences in the E0 values for the subsequent two one‐electron transfer steps are used as indicators for the interaction between the metal centers in the bis(salen) complexes. The effects of solvent and supporting electrolyte are consistent with the assumption of electrostatic through‐space interactions and coordination to the Co centers. In the dinuclear complexes step‐wise electron transfers according to normal potential ordering makes these compounds "pretenders" in Winter's terms (R.F. Winter, Organometallics2014, 33, 4517–4536).
- Subjects
COBALT; CHARGE exchange; ELECTROSTATIC interaction; DIFFUSION coefficients; CYCLIC voltammetry; ACETONITRILE; VOLTAMMETRY
- Publication
ChemElectroChem, 2021, Vol 8, Issue 15, p2888
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.202100709