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(η4-Tetraphenylcyclobutadiene)-(η5-pentaphenylcyclopentadienyl)-cobalt. MOLBANK 2022. [DOI: 10.3390/m1502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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 1H, 13C-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(π) interactions between the phenyl groups on the same ring, as well as between rings.
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Avello MG, Torre MC, Sierra MA, Gornitzka H, Hemmert C. Central (S) to Central (M=Ir, Rh) to Planar (Metallocene, M=Fe, Ru) Chirality Transfer Using Sulfoxide‐Substituted Mesoionic Carbene Ligands: Synthesis of Bimetallic Planar Chiral Metallocenes. Chemistry 2019; 25:13344-13353. [DOI: 10.1002/chem.201902102] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/24/2019] [Indexed: 01/15/2023]
Affiliation(s)
- Marta G. Avello
- Instituto de Química Orgánica General Consejo Superior de Investigaciones Científicas (IQOG-CSIC) Juan de la Cierva 3 28006 Madrid Spain
- Centro de Investigación en Química Avanzada (ORFEO-CINQA) Universidad Complutense 28040 Madrid Spain
| | - María C. Torre
- Instituto de Química Orgánica General Consejo Superior de Investigaciones Científicas (IQOG-CSIC) Juan de la Cierva 3 28006 Madrid Spain
- Centro de Investigación en Química Avanzada (ORFEO-CINQA) Universidad Complutense 28040 Madrid Spain
| | - Miguel A. Sierra
- Centro de Investigación en Química Avanzada (ORFEO-CINQA) Universidad Complutense 28040 Madrid Spain
- Departamento de Química Orgánica I Facultad de Química Universidad Complutense 28040 Madrid Spain
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