Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen:
http://dx.doi.org/10.18419/opus-7957
Autor(en): | Niecke, Edgar Metternich, Hans-Jürgen Nieger, Martin Gudat, Dietrich Wenderoth, Peter Malisch, Wolfgang Hahner, Christoph Reich, Wolfgang |
Titel: | Methylenphosphanyl-Komplexe von Chrom, Molybdän, Wolfram, Eisen und Nickel: Synthese und Reaktionen |
Sonstige Titel: | Methylenephosphanyl complexes of chromium, molybdenum, tungsten, iron and nickel - synthesis and reactivity |
Erscheinungsdatum: | 1993 |
Dokumentart: | Zeitschriftenartikel |
Erschienen in: | Chemische Berichte 126 (1993), S. 1299-1309. URL http://dx.doi.org./10.1002/cber.19931260606 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-74317 http://elib.uni-stuttgart.de/handle/11682/7974 http://dx.doi.org/10.18419/opus-7957 |
Zusammenfassung: | The reaction of the functionalized P/C double bond systems X-P=C(R)SiMe3 [R = SiMe3 and X = Cl (1a), Cp* (5a) or R = Ph and X = Br (1b), Cp* (5b)] with alkali carbonylmetallates or carbonyl complexes of group 6, 8, and 10 metals leads to the formation of the transition metal-substituted phosphaalkenes [{M}-P=C(R)SiMe3 3a-j and 4a-i], in which the P-C fragment acts as a one-electron donor. Depending on the nucleophilicity of the transition metal anion used, but also on the methylene carbon substituents [1a: (SiMe3)2; 1b: (Ph)-SiMe3], a different stability of the (methylenephosphanyl)1-metal complexes is observed, which results in a broad spectrum of reactivities. As demonstrated by the reactions of the (methylenephosphanyl)metal complexes with sulfonic acid derivatives (10a-c), diverse transition metal complexes (11a-c), as well as chalcogenes (14a-c, 15), a change in the reactivity is observed, indicating a transition from an olefinic to a carbenic character of the methylenephosphane. In comparison to the phenyl-substituted derivatives 4a-i the bis(trimethyl)1-substituted species 3a-j exhibit an increased reactivity. This is reflected in the easy decarbonylation of 3a-d to the phosphavinylidene complexes 12a-d. |
Enthalten in den Sammlungen: | 15 Fakultätsübergreifend / Sonstige Einrichtung |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
---|---|---|---|---|
gud4.pdf | 3,54 MB | Adobe PDF | Öffnen/Anzeigen |
Alle Ressourcen in diesem Repositorium sind urheberrechtlich geschützt.