Copper complexes of new redox-active 4,5-bisguanidino-substituted benzodioxole ligands

• Verfasst von: Schrempp, David [VerfasserIn]
• Verfasst von: Kaifer, Elisabeth [VerfasserIn]
• Verfasst von: Wadepohl, Hubert [VerfasserIn]
• Verfasst von: Himmel, Hans-Jörg [VerfasserIn]
• Titel: Copper complexes of new redox-active 4,5-bisguanidino-substituted benzodioxole ligands
• Titelzusatz: control of the electronic structure by counter-ligands, solvent, and temperature
• Verf.angabe: David Fridolin Schrempp, Elisabeth Kaifer, Hubert Wadepohl, and Hans-Jörg Himmel
• E-Jahr: 2016
• Jahr: September 28, 2016
• Umfang: 13 S.
• Fussnoten: Gesehen am 22.05.2020
• Titel Quelle: Enthalten in: Chemistry - a European journal
• Ort Quelle: Weinheim : Wiley-VCH, 1995
• Jahr Quelle: 2016
• Band/Heft Quelle: 22(2016), 45, Seite 16187-16199
• ISSN Quelle: 1521-3765
• DOI: doi:10.1002/chem.201602402
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: copper complexes
• Sach-SW: electron transfer
• Sach-SW: electronic structures
• Sach-SW: redox-active ligands
• Sach-SW: valence tautomerism
• K10plus-PPN: 1698678266

Abstract

Herein, we analyze the possibility of controlling the electronic structure of mononuclear copper complexes featuring new redox-active 4,5-bisguanidino-substituted benzodioxole ligands. The nature of the guanidino groups, the anionic counter-ligands, the applied solvent (polarity), and the temperature are the parameters that decide if a CuII complex with neutral ligand unit or a CuI complex with radical monocationic ligand unit is the adequate description. Under special conditions, a temperature-dependent equilibrium of the two valence tautomeric forms (CuII/neutral ligand and CuI/radical monocationic ligand) is achieved. Removal of a ligand-centered electron from a paramagnetic CuII complex with a neutral ligand unit leads to a diamagnetic CuI complex with a dicationic ligand unit through a redox-induced electron-transfer (RIET) process.