Mono(alkyne)cobalt complexes and electron-rich alkynes: the formation of an alkyne-bridged dinuclear cobalt complex by a one-pot procedure
[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...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
August 17, 2004
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| In: |
European journal of inorganic chemistry
Year: 2004, Issue: 20, Pages: 4021-4027 |
| ISSN: | 1099-0682 |
| DOI: | 10.1002/ejic.200400339 |
| Online Access: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1002/ejic.200400339 Verlag, lizenzpflichtig, Volltext: https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/ejic.200400339 
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| Author Notes: | Daniel B. Werz, Rolf Gleiter, and Frank Rominger |
| Summary: | [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) |
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| Item Description: | Gesehen am 23.10.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1099-0682 |
| DOI: | 10.1002/ejic.200400339 |