Zinc(II)–phenoxyl radical complexes: Dependence on complexation properties of Zn–phenolate species

Properties of the indole ring in metal complexes. A comparison with the phenol ring

“…On the basis of these considerations, we assigned the oxidized form of iepp-C having a peak at~550 nm to the indole π-cation radical species, whose unpaired electron is inferred to be localized in the indole ring (Scheme 2) [70]. Similar spectral characteristics were also observed for one-electron oxidized Pt(II) complex Pt-iepp-C, indicating that the one-electron oxidized form is also assigned to a Pt(II)-indole-π-cation radical species [73]. Comparison of the stability of the indole radical species between the Pd and Pt complexes indicates that the Pt(II)-indole-π-cation radical species is more stable than the corresponding Pd(II) complex probably due to the inertness of Pt(II) ion toward ligand exchange.…”

“…The mechanisms of the Pd-catalyzed C-C bond formation have been studied in detail, and the σ-bonded Pd-C intermediate is now concluded to be formed in the course of the reaction [69]. From these points of view, some Pd(II)-and Pt(II)-indole σ-bond complexes have been reported [70][71][72][73][74].…”

Nuclease Activity via Self-Activation and Anticancer Activity of a Mononuclear Copper(II) Complex: Novel Role of the Tertiary Butyl Group in the Ligand Frame

“…generation of phenoxyl radical ( 1 •+ ) complex ( E 1/2 , +1.014 V and Δ E p , 0.158 V). 16 Repeated scans as well as different scan rates clearly expressed the generation of phenoxyl radical complex and regeneration of 1 . This was also supported by UV-vis spectral data (vide infra) (Inset Figure 3).…”

Assorted Phenoxyl-Radical Polymers and Their Application in Lithium-Organic Batteries

“…Furthermore, phenoxyl‐radicals are also often found in metal‐complexes as part of enzymes . A popular example of this compound is the galactose oxidase . Persistent radicals have also been successfully utilized for ORBs.…”