Mono(alkyne)cobalt complexes and electron-rich alkynes

• Verfasst von: Werz, Daniel B. [VerfasserIn]
• Verfasst von: Gleiter, Rolf [VerfasserIn]
• Verfasst von: Rominger, Frank [VerfasserIn]
• Titel: Mono(alkyne)cobalt complexes and electron-rich alkynes
• Titelzusatz: the formation of an alkyne-bridged dinuclear cobalt complex by a one-pot procedure
• Verf.angabe: Daniel B. Werz, Rolf Gleiter, and Frank Rominger
• E-Jahr: 2004
• Jahr: August 17, 2004
• Umfang: 7 S.
• Fussnoten: Gesehen am 23.10.2020
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2004
• Band/Heft Quelle: (2004), 20, Seite 4021-4027
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.200400339
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Alkynes
• Sach-SW: Chalcogens
• Sach-SW: Cobalt
• Sach-SW: Cyclobutadiene complexes
• K10plus-PPN: 173647507X

Abstract

[η2-Bis(tert-butylsulfonyl)acetylene](carbonyl)(η5-trimethylsilylcyclopentadienyl)cobalt (2c) proved to be reactive towards bis(telluro)- and bis(seleno)-substituted alkynes 3 and 4, respectively, to yield push-pull-substituted CpCo-stabilized cyclobutadiene complexes. By utilizing the unsymmetrical diyne 6 and the symmetrical bis(thio)-substituted triyne 7 it was shown that only the most electron-rich triple bond was attacked by the electrophilic compound 2c. In the case of 7 a dinuclear CpCo-stabilized cyclobutadiene complex 14 bridged by one acetylene moiety was obtained. All the reactions could be carried out at room temperature under rather mild conditions. X-ray investigations of 8, 12, 14a, and 15 show almost equal C−C bond lengths in the cyclobutadiene moieties. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)