KOPS - The Institutional Repository of the University of Konstanz

Formation and Structure of Heptacoordinate Dihalogeno Carbene-C,O Chelate Complexes and Dihalogeno Carbene-C,O Chelate Phosphine Complexes of Molybdenum(II) and Tungsten(II) :  A New Class of Fischer Type Carbene Complexes

Formation and Structure of Heptacoordinate Dihalogeno Carbene-C,O Chelate Complexes and Dihalogeno Carbene-C,O Chelate Phosphine Complexes of Molybdenum(II) and Tungsten(II) :  A New Class of Fischer Type Carbene Complexes

Cite This

Files in this item

Files Size Format View

There are no files associated with this item.

STUMPF, Rüdiger, Monika JAEGER, Helmut FISCHER, 2001. Formation and Structure of Heptacoordinate Dihalogeno Carbene-C,O Chelate Complexes and Dihalogeno Carbene-C,O Chelate Phosphine Complexes of Molybdenum(II) and Tungsten(II) :  A New Class of Fischer Type Carbene Complexes. In: Organometallics. 20(19), pp. 4040-4048. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/om010429e

@article{Stumpf2001Forma-22959, title={Formation and Structure of Heptacoordinate Dihalogeno Carbene-C,O Chelate Complexes and Dihalogeno Carbene-C,O Chelate Phosphine Complexes of Molybdenum(II) and Tungsten(II) :  A New Class of Fischer Type Carbene Complexes}, year={2001}, doi={10.1021/om010429e}, number={19}, volume={20}, issn={0276-7333}, journal={Organometallics}, pages={4040--4048}, author={Stumpf, Rüdiger and Jaeger, Monika and Fischer, Helmut} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/22959"> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/22959"/> <dc:contributor>Fischer, Helmut</dc:contributor> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:title>Formation and Structure of Heptacoordinate Dihalogeno Carbene-C,O Chelate Complexes and Dihalogeno Carbene-C,O Chelate Phosphine Complexes of Molybdenum(II) and Tungsten(II) :  A New Class of Fischer Type Carbene Complexes</dcterms:title> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dcterms:bibliographicCitation>Organometallics ; 20 (2001), 19. - S. 4040-4048</dcterms:bibliographicCitation> <dc:creator>Stumpf, Rüdiger</dc:creator> <dc:rights>terms-of-use</dc:rights> <dc:language>eng</dc:language> <dcterms:issued>2001</dcterms:issued> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-06-05T06:52:25Z</dcterms:available> <dc:creator>Fischer, Helmut</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-06-05T06:52:25Z</dc:date> <dcterms:abstract xml:lang="eng">The carbene-C,O chelate carbonyl tungsten(0) complex (1) reacts with phosphines by opening of the chelate ring to form [(CO)4(PR3)WC(OMe)C6H4OMe-o] (R = Me (5), nBu (6), Ph (7), Cy (8)). Treatment of 5 and 6 with SnX4 affords by oxidative decarbonylation, depending on R and X, either one or two isomers of the carbene-C,O chelate dicarbonyl phosphine tungsten(II) complexes (R = Me, X = Cl (9a), Br (9b), I (9c-A/9c-B); R = nBu, X = Cl (10a), Br (10b-A/10b-B), I (10c)). The isomers do not interconvert. In the corresponding reaction of 7 with SnBr4 instead of a carbene-C,O chelate dicarbonyl phosphine tungsten(II) complex the carbene-C,O chelate tricarbonyl tungsten(II) complex (3b) is formed. When 8 is treated with SnBr4, the formation of a carbene-C,O chelate phosphine tungsten(II) complex cannot be detected any more. Like the o-OMe tungsten(0) complexes 5 and 6 the p-OMe tungsten(0) complex [(CO)4(PnBu3)WC(OMe)C6H4OMe-p] (11) and the ring-unsubstituted complex [(CO)4(PnBu3)WC(OMe)Ph] (13) react with SnBr4 by oxidative decarbonylation and formation of W(II) complexes, [Br2(CO)3(PnBu3)WC(OMe)R‘] (R‘ = C6H4OMe-p, Ph) (two isomers each). Dicarbonyl carbene-C,O chelate trimethylphosphine metal(II) complexes (M = Mo, W; X = Cl, Br) are also accessible by substitution of PMe3 for a CO ligand in However, when PMe3 is replaced by the bulkier PPh3 in the reaction with instead of substitution, the opening of the chelate ring is observed.</dcterms:abstract> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:contributor>Jaeger, Monika</dc:contributor> <dcterms:rights rdf:resource="https://kops.uni-konstanz.de/page/termsofuse"/> <dc:contributor>Stumpf, Rüdiger</dc:contributor> <dc:creator>Jaeger, Monika</dc:creator> </rdf:Description> </rdf:RDF>

This item appears in the following Collection(s)

Search KOPS


Browse

My Account