Synthesis and Electrochemical Properties of
2-(4-R1-Phenyl)-6-(4-R2-phenyl)-4-phenyl-3,4-dihydro1,2,4,5-tetrazin-1(2H)-yls
摘要:
A new methodology for creating electroactive components for organic batteries, based on the construction of a molecular platform including stable 3,4-dihydro-1,2,4,5-tetrazin-1(2H)-yl radicals was described. A series of 2-(4-R-1-phenyl)-6-(4-R-2-phenyl)-4-phenyl-3,4-dihydro-1,2,4,5-tetrazin-1(2H)-yls with substituents of various nature was obtained. It was shown that the substituents R-1 in the aromatic ring at position 2 of the tetrazinyl fragment influence the value of the oxidation potential in the radical, but do not influence the value of the reduction potentials, while the substituent R-2 of the aromatic ring at position 6 influence the values of the reduction potentials and practically do not influence oxidation potential values. Based on the obtained electrochemical data, a correlation structure-potential value was revealed for the cathodic and anodic process, with the help of which triarylsubstituted 3,4-dihydro-1,2,4,5-tetrazin-1(2H)-yl radicals with high values of the electrochemical gap were obtained.
Reversible Ligand-Centered Reduction in Low-Coordinate Iron Formazanate Complexes
作者:Daniël L. J. Broere、Brandon Q. Mercado、James T. Lukens、Avery C. Vilbert、Gourab Banerjee、Hannah M. C. Lant、Shin Hee Lee、Eckhard Bill、Stephen Sproules、Kyle M. Lancaster、Patrick L. Holland
DOI:10.1002/chem.201801298
日期:2018.7.2
Coordination of redox‐activeligands to metals is a compelling strategy for making reduced complexes more accessible. In this work, we explore the use of redox‐active formazanate ligands in low‐coordinate iron chemistry. Reduction of an iron(II) precursor occurs at milder potentials than analogous non‐redox‐active β‐diketiminate complexes, and the reduced three‐coordinate formazanate‐iron compound
Highly Selective Single‐Component Formazanate Ferrate(II) Catalysts for the Conversion of CO
<sub>2</sub>
into Cyclic Carbonates
作者:Aeilke J. Kamphuis、Francesca Milocco、Luuk Koiter、Paolo P. Pescarmona、Edwin Otten
DOI:10.1002/cssc.201900740
日期:2019.8.8
anionic mono(formazanate) iron(II) complexes bearing labile halide ligands, which possess both Lewis acidic and nucleophilic functionalities, have been developed as novel single‐component homogeneous catalysts for the reaction of CO2 with epoxides to produce cyclic carbonates. The influence of the halide ligand and the electronic properties of the formazanate ligand backbone on the catalytic activity
Microwave mediated solvent free synthesis of formazans catalyzed by simple ionic liquids derived from dialkylammonium salts
作者:Pranab Jyoti Das、Jesmin Begum
DOI:10.1039/c5ra06363a
日期:——
Microwave assisted solvent free one pot synthesis of formazans, catalysed by ionic liquid is reported for the first time.
首次报道了离子液体催化的微波辅助无溶剂一锅法合成甲醛胺。
Formazans as β-diketiminate analogues. Structural characterization of boratatetrazines and their reduction to borataverdazyl radical anions
作者:Joe B. Gilroy、Michael J. Ferguson、Robert McDonald、Brian O. Patrick、Robin G. Hicks
DOI:10.1039/b609365e
日期:——
Formazans react with boron triacetate to produce boratatetrazines, which can be reduced to yield borataverdazyl radical anionsâthe first boron containing verdazyl radicals.
Three-Coordinate Zinc Methyl Complexes with Sterically Demanding Formazanate Ligands
作者:Folkert de Vries、Raquel Travieso-Puente、Peter Roewen、Edwin Otten
DOI:10.1021/acs.organomet.0c00720
日期:2021.1.11
methyl complexes were synthesized, and the influence of the ligand on the structure as well as redox and optical properties of these complexes was investigated. The heteroleptic mono(formazanate)zinc methyl complexes were found to show ligand redistribution in solution, reminiscent of the Schlenk equilibrium, to generate an equilibrium mixture containing the corresponding homoleptic complexes as well