Redox-active guanidine ligands with pyridine and p-benzoquinone backbones

• Verfasst von: Stang, Simone [VerfasserIn]
• Verfasst von: Lebkücher, Anna [VerfasserIn]
• Verfasst von: Walter, Petra [VerfasserIn]
• Verfasst von: Kaifer, Elisabeth [VerfasserIn]
• Verfasst von: Himmel, Hans-Jörg [VerfasserIn]
• Titel: Redox-active guanidine ligands with pyridine and p-benzoquinone backbones
• Verf.angabe: Simone Stang, Anna Lebkücher, Petra Walter, Elisabeth Kaifer, and Hans-Jörg Himmel
• E-Jahr: 2012
• Jahr: 07 October 2012
• Umfang: 13 S.
• Fussnoten: Gesehen am 14.08.2018
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2012
• Band/Heft Quelle: (2012), 30, Seite 4833-4845
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.201200679
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Coordination compounds
• Sach-SW: Copper
• Sach-SW: Density functional calculations
• Sach-SW: Guanidine
• Sach-SW: Redox chemistry
• K10plus-PPN: 1580017231

Abstract

Herein we report on the synthesis and some aspects of the chemistry of the new redox-active ligands 2,3,5,6-tetrakis(tetramethylguanidino)pyridine, 2,3,5,6-tetrakis(tetramethylguanidino)-p-benzoquinone and 2,3,5,6-tetrakis(N,N′-dimethyl-N,N′-ethyleneguanidino)-p-benzoquinone. All three ligands are strong electron donors. In addition, the p-benzoquinone systems feature low LUMO energies and small HOMO-LUMO gaps. A comparison of the ligands was made with regard to their optical properties, Brønsted basicity and electron-donor properties; results of quantum chemical calculations were included in this comparison. Subsequently, dinuclear copper complexes were prepared. Preliminary experiments on their redox chemistry followed.