Synthesis and characterization of novel guanidine ligands featuring biphenyl or binaphthyl backbones

• Verfasst von: Maronna, Astrid Christine [VerfasserIn]
• Verfasst von: Bindewald, Elvira [VerfasserIn]
• Verfasst von: Kaifer, Elisabeth [VerfasserIn]
• Verfasst von: Wadepohl, Hubert [VerfasserIn]
• Verfasst von: Himmel, Hans-Jörg [VerfasserIn]
• Titel: Synthesis and characterization of novel guanidine ligands featuring biphenyl or binaphthyl backbones
• Verf.angabe: Astrid Maronna, Elvira Bindewald, Elisabeth Kaifer, Hubert Wadepohl, and Hans-Jörg Himmel
• E-Jahr: 2011
• Jahr: 26 January 2011
• Umfang: 13 S.
• Fussnoten: Gesehen am 11.08.2022
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2011
• Band/Heft Quelle: (2011), 8, Seite 1302-1314
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.201000981
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Biaryl compounds
• Sach-SW: Coordination modes
• Sach-SW: Guanidine
• Sach-SW: Platinum
• K10plus-PPN: 1814169695

Abstract

In this paper we report on the synthesis and characterization of several new 2,2′-bisguanidino-1,1′-biphenyl and -binaphthyl ligands as well as the electron donor 3,3′,4,4′-tetrakis(tetramethylguanidino)-1,1′-biphenyl. Chiral bisguanidine ligands were prepared with binaphthyl backbones. The solid-state structures were analysed by single-crystal X-ray diffraction. UV/Vis and Raman spectra provided a qualitative insight into the rotational barriers in solution and in the solid state. Finally, late-transition-metal complexes of two of these ligands were prepared. These complexes prefer a κ1 rather than a κ2 coordination mode. The discussion of the experimental results is complemented by quantum chemical (DFT) calculations. Finally, we report on the first catalytic test reactions.