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Reactions of 1,8-diheterocyclotetradeca-4,11-diynes with (η4-cycloocta-1,5-diene)(η5-cyclopentadienyl)cobalt

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The following monocyclic and bicyclic 14-membered diynes were treated with [CpCo(cod)]: 1-oxacyclotetradeca-4,11-diyne (2), 1,8-dioxacyclotetradeca-4,11-diyne (3), cyclotetradeca-4,11-diynone (4), cyclotetradeca-4,11-diyne-1,8-dione (5), 1,1,8,8-tetramethyl-1,8-disilacyclotetradeca-4,11-diyne (6), 1...

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Bibliographic Details
Main Authors: Wolfart, Volker (Author) , Ramming, Matthias (Author) , Gleiter, Rolf (Author) , Nuber, Bernhard (Author) , Pritzkow, Hans (Author) , Rominger, Frank (Author)
Format: Article (Journal)
Language:English
Published: 10 February 1999
In: European journal of inorganic chemistry
Year: 1999, Issue: 3, Pages: 499-504
ISSN:1099-0682
DOI:10.1002/(SICI)1099-0682(199903)1999:3<499::AID-EJIC499>3.0.CO;2-E
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Author Notes:Volker Wolfart, Matthias Ramming, Rolf Gleiter, Bernhard Nuber, Hans Pritzkow, and Frank Rominger
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Summary:The following monocyclic and bicyclic 14-membered diynes were treated with [CpCo(cod)]: 1-oxacyclotetradeca-4,11-diyne (2), 1,8-dioxacyclotetradeca-4,11-diyne (3), cyclotetradeca-4,11-diynone (4), cyclotetradeca-4,11-diyne-1,8-dione (5), 1,1,8,8-tetramethyl-1,8-disilacyclotetradeca-4,11-diyne (6), 1-allyl-1-azacyclotetradeca-4,11diyne (7), 1,8-dipropyl-1,8-diazacyclotetradeca-1,11-diyne (8), 1,8-diallyl-1,8-diazacyclotetradeca-4,11-diyne (9), 1,8-diazabicyclo[6.6.4]octadeca-4,11-diyne (10), 1,8-diazabicyclo[6.6.6]eicosa-4,11-diyne (11), 1,10-diazabicyclo[8.6.6]docosa-13,19-diyne (12) and 1,12-diazabicyclo[10.6.6]tetracosa-15,21-diyne (13). In all cases we obtained an intramolecular cyclobutadiene complex stabilized with a CpCo fragment (15-26). For 3 we could isolate, besides the cyclobutadiene complex 16, the trimerization product 28. In the cases of 15, 16, 18, 20, 23, 25, and 26 the structure of the cylobutadiene complexes could be confirmed by X-ray studies. Common to all structures is a boat-like conformation of the tricyclic unit containing the cyclobutadiene ring. The two cycloheptene units adopt a chair conformation in which the heteroatom is removed from the metal center.
Item Description:Im Titel erscheinen bei den Begriffen η4 und η5 die Ziffern jeweils hochgestellt
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Physical Description:Online Resource
ISSN:1099-0682
DOI:10.1002/(SICI)1099-0682(199903)1999:3<499::AID-EJIC499>3.0.CO;2-E

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