Donor-substituted CpCo-stabilized cyclobutadienes and superphanes

• Verfasst von: Werz, Daniel B. [VerfasserIn]
• Verfasst von: Schulte, Jan Hilko [VerfasserIn]
• Verfasst von: Gleiter, Rolf [VerfasserIn]
• Verfasst von: Rominger, Frank [VerfasserIn]
• Titel: Donor-substituted CpCo-stabilized cyclobutadienes and superphanes
• Verf.angabe: Daniel B. Werz, J. Hilko Schulte, Rolf Gleiter, Frank Rominger
• E-Jahr: 2004
• Jahr: 12 August 2004
• Umfang: 11 S.
• Fussnoten: Gesehen am 30.10.2020
• Titel Quelle: Enthalten in: Journal of organometallic chemistry
• Ort Quelle: New York, NY [u.a.] : Elsevier, 1963
• Jahr Quelle: 2004
• Band/Heft Quelle: 689(2004), 20, Seite 3132-3142
• ISSN Quelle: 1872-8561
• DOI: doi:10.1016/j.jorganchem.2004.06.048
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Alkynes
• Sach-SW: Cobalt
• Sach-SW: Cyclobutadiene complexes
• Sach-SW: Superphanes
• K10plus-PPN: 1737436604

Abstract

RCpCoL2 complexes (L2=(CO)2 or COD, R=H, CO2Me, TMS) were reacted with various alkynes substituted with chalcogen atoms adjacent to the triple bonds. These reactions yielded hetero-substituted CpCo-capped cyclobutadienes and superphanes dependent on the ring size of the corresponding cyclic diene used as starting material. Reactions in decaline afforded not only CpCo-capped cyclobutadieno superphanes, but also mixed cyclobutadieno cyclopentadienono superphanes. X-ray analyses do not indicate a significant amount of conjugation between the π systems and the lone pairs of the heteroatoms whereas cyclic voltammetry reveals an easier oxidation when increasing the number of electron-donating heteroatoms.