Activation and deactivation of a carbene containing non-classical ruthenium hydride complex in catalytic processes involving C–H bond cleavage
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| Title: | Activation and deactivation of a carbene containing non-classical ruthenium hydride complex in catalytic processes involving C–H bond cleavage |
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| Authors: | Buskens, Pascal1, Giunta, Daniela1, Leitner, Walter leitner@itmc.rwth-aachen.de |
| Source: | Inorganica Chimica Acta. Apr2004, Vol. 357 Issue 6, p1969. 6p. |
| Subjects: | Carbenes, Ruthenium compounds, Ketones, Nuclear magnetic resonance |
| Abstract: | The carbene-containing non-classical ruthenium hydride complex [(PCy3)Ru(H)2(H2)2(IMes)] 1 (IMes=1,3-Bis-(2,4,6-trimethylphenyl)imidazol-2-ylidene) is an active catalyst for H/D exchange in aromatic ketones. It is also capable of combining sp2 C–H bond activation with C–C bond formation. Comparing the chemo- and regio-selectivities of the H/D exchange process and the C–C bond formation clearly indicates that different intermediates are involved in the two processes. High pressure NMR studies provide strong evidence that the key intermediate for the C–C coupling reaction is analogous to that for other ruthenium catalysts reported previously. Catalytic turnover is limited by the instability of this intermediate in the presence of the olefinic coupling partner. [Copyright &y& Elsevier] |
| Copyright of Inorganica Chimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 12741063 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Activation and deactivation of a carbene containing non-classical ruthenium hydride complex in catalytic processes involving C–H bond cleavage – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Buskens%2C+Pascal%22">Buskens, Pascal</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Giunta%2C+Daniela%22">Giunta, Daniela</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Leitner%2C+Walter%22">Leitner, Walter</searchLink><i> leitner@itmc.rwth-aachen.de</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Inorganica+Chimica+Acta%22">Inorganica Chimica Acta</searchLink>. Apr2004, Vol. 357 Issue 6, p1969. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Carbenes%22">Carbenes</searchLink><br /><searchLink fieldCode="DE" term="%22Ruthenium+compounds%22">Ruthenium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Ketones%22">Ketones</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+magnetic+resonance%22">Nuclear magnetic resonance</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The carbene-containing non-classical ruthenium hydride complex [(PCy3)Ru(H)2(H2)2(IMes)] 1 (IMes=1,3-Bis-(2,4,6-trimethylphenyl)imidazol-2-ylidene) is an active catalyst for H/D exchange in aromatic ketones. It is also capable of combining sp2 C–H bond activation with C–C bond formation. Comparing the chemo- and regio-selectivities of the H/D exchange process and the C–C bond formation clearly indicates that different intermediates are involved in the two processes. High pressure NMR studies provide strong evidence that the key intermediate for the C–C coupling reaction is analogous to that for other ruthenium catalysts reported previously. Catalytic turnover is limited by the instability of this intermediate in the presence of the olefinic coupling partner. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Inorganica Chimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ica.2004.01.018 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 1969 Subjects: – SubjectFull: Carbenes Type: general – SubjectFull: Ruthenium compounds Type: general – SubjectFull: Ketones Type: general – SubjectFull: Nuclear magnetic resonance Type: general Titles: – TitleFull: Activation and deactivation of a carbene containing non-classical ruthenium hydride complex in catalytic processes involving C–H bond cleavage Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Buskens, Pascal – PersonEntity: Name: NameFull: Giunta, Daniela – PersonEntity: Name: NameFull: Leitner, Walter IsPartOfRelationships: – BibEntity: Dates: – D: 20 M: 04 Text: Apr2004 Type: published Y: 2004 Identifiers: – Type: issn-print Value: 00201693 Numbering: – Type: volume Value: 357 – Type: issue Value: 6 Titles: – TitleFull: Inorganica Chimica Acta Type: main |
| ResultId | 1 |
