(η4-Tetraphenylcyclobutadiene)-(η5-pentaphenylcyclopentadienyl)-cobalt

Klein-Hessling, Christian and Sünkel, Karlheinz (2022): (η4-Tetraphenylcyclobutadiene)-(η5-pentaphenylcyclopentadienyl)-cobalt. In: Molbank, Vol. 2022, No. 4, M1502

Abstract

A one-pot reaction starting with C5Ph5Br, n-BuLi and [CoCl(PPh3)(3)] followed by the addition of diphenylethyne produces the title compound with 12% yield. Spectroscopic characterization involved H-1, C-13-NMR, UV-Vis and mass spectrometry. A crystal structure determination showed that the central aromatic rings are exactly parallel with the cyclobutadiene ring further apart from the metal as usual. The pentaphenyl-cyclopentadienyl ligand shows an usual paddlewheel orientation, whereas in the tetraphenyl-cyclobutadiene ligand, two of the phenyl groups are nearly coplanar with the four-membered ring. There are also numerous C-H... C(pi) interactions between the phenyl groups on the same ring, as well as between rings.

• Item Type: Journal article
• Faculties: Chemistry and Pharmacy > Department of Chemistry
• Subjects: 500 Science > 540 Chemistry
• Language: English