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Conjugated Polyunsaturated Oxacyclic Carbene Complexes : Synthesis, Structure, and Properties

Conjugated Polyunsaturated Oxacyclic Carbene Complexes : Synthesis, Structure, and Properties

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FISCHER, Helmut, Michael RÄDLER, Alexander MOSBACHER, Matthias DREXLER, Eike HÜBNER, Bernhard WEIBERT, Jürgen HECK, Christian WITTENBERG, Stefan STEFFENS, 2007. Conjugated Polyunsaturated Oxacyclic Carbene Complexes : Synthesis, Structure, and Properties. In: Collection of Czechoslovak Chemical Communications. 72(4), pp. 503-526. ISSN 0010-0765. eISSN 1212-6950

@article{Fischer2007Conju-22830, title={Conjugated Polyunsaturated Oxacyclic Carbene Complexes : Synthesis, Structure, and Properties}, year={2007}, doi={10.1135/cccc20070503}, number={4}, volume={72}, issn={0010-0765}, journal={Collection of Czechoslovak Chemical Communications}, pages={503--526}, author={Fischer, Helmut and Rädler, Michael and Mosbacher, Alexander and Drexler, Matthias and Hübner, Eike and Weibert, Bernhard and Heck, Jürgen and Wittenberg, Christian and Steffens, Stefan} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/22830"> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <dcterms:bibliographicCitation>Collection of Czechoslovak chemical communications ; 72 (2007), 4. - S. 503-526</dcterms:bibliographicCitation> <dc:creator>Fischer, Helmut</dc:creator> <dc:creator>Rädler, Michael</dc:creator> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-05-24T07:33:58Z</dcterms:available> <dc:creator>Steffens, Stefan</dc:creator> <dc:creator>Heck, Jürgen</dc:creator> <dc:contributor>Fischer, Helmut</dc:contributor> <dc:contributor>Rädler, Michael</dc:contributor> <dc:creator>Drexler, Matthias</dc:creator> <dc:contributor>Weibert, Bernhard</dc:contributor> <dcterms:issued>2007</dcterms:issued> <dc:contributor>Drexler, Matthias</dc:contributor> <dc:contributor>Steffens, Stefan</dc:contributor> <dc:language>eng</dc:language> <dc:creator>Wittenberg, Christian</dc:creator> <dcterms:title>Conjugated Polyunsaturated Oxacyclic Carbene Complexes : Synthesis, Structure, and Properties</dcterms:title> <dc:rights>deposit-license</dc:rights> <dc:contributor>Wittenberg, Christian</dc:contributor> <dc:contributor>Heck, Jürgen</dc:contributor> <dc:creator>Mosbacher, Alexander</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-05-24T07:33:58Z</dc:date> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/22830"/> <dc:contributor>Mosbacher, Alexander</dc:contributor> <dcterms:abstract xml:lang="eng">The reaction of [(CO)5M(thf)] with but-3-yn-1-ols in the presence of NEt3 offers a convenient route to 2-oxacyclopentylidene complexes [(CO)5M=C-O-CH2CH2CH2] (M = Cr (1a), W (1b)) in yields up to 96%. Furthermore, the reaction of 1 with ω-(dimethylamino)- substituted enals, Me2N-(CH=CH)n-C(=O)H, activated by Me3SiCl/NEt3 or POCl3/NEt3 gives via aldol condensation the unsaturated oxacyclic push-pull carbene complexes [(CO)5M=C-O-CH2CH2C{=CH-(CH=CH)n-NMe2}] (n = 0 (2), 1 (3), 2 (4), 3 (5)). In 2-5, the amino group acts as an electron-donor unit and the oxacyclic carbene pentacarbonyl moiety as an electron acceptor. The aminometallaenes 2-5 have been characterized spectroscopically, the chromium complexes 2a-5a additionally by X-ray structure analysis. For some complexes, their nonlinear optical properties (second harmonic generation) have been studied and β values up to 58 × 10-30 esu have been determined. The results of DFT calculations on chromium complexes 2a-5a show that on lengthening of the unsaturated chain the influence of the carbonyl-metal fragment on the polyunsaturated chain strongly decreases.</dcterms:abstract> <dc:creator>Hübner, Eike</dc:creator> <dc:creator>Weibert, Bernhard</dc:creator> <dc:contributor>Hübner, Eike</dc:contributor> </rdf:Description> </rdf:RDF>

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