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Phosphenium Complexes, XXIX [1]. [4+2]-Cycloaddition of Phosphenium Complexes of the Type Cp(OC)

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Phosphenium-Komplexe, XXIX [1].

[4+2]-Cycloadditionen von Phospheniumkomplexen des Typs Cp(OC)

2

W=PR

2

(R = Alkyl, Aryl) mit 2,3-Dimethylbutadien

Phosphenium Complexes, XXIX [1]. [4+2]-Cycloaddition of Phosphenium Complexes of the Type Cp(OC)

2

W=PR

2

(R = Alkyl, Aryl) with 2,3-Dimethylbutadiene

Wolfgang Malisch

;a

, Klaus Gr¨un

a

, Alexander Fried

a

, Wolfgang Reich

a

, Martin Schmeußer

a

, Udo Weis

a

, Christa Abd El Baky

a

, Carl Kr¨uger

b

aInstitut f¨ur Anorganische Chemie der Universit¨at W¨urzburg, Am Hubland, D-97074 W¨urzburg, Germany

bMax-Planck-Institut f¨ur Kohleforschung, Kaiser-Wilhelm-Platz 1, D-45470 M ¨ulheim a. d. Ruhr, Germany

Herrn Prof. E. Niecke zum 60. Geburtstag gewidmet

Z. Naturforsch.53 b,1506–1510 (1998); eingegangen am 12. Mai 1998

Phosphenium Complexes, 1,3-Dienes, [4+2]-Cycloaddition, Phosphametallacyclohexenes The phosphenium complexes Cp(OC)2W=PR2[R = Ph, o-Tol, Me, t-Bu, (2a - d)] react with 2,3-dimethyl-1,3-butadiene (3) via [4+2]-cycloaddition to form the phosphametallacyclohexe- nes Cp(OC)2W-PR2-CH2-CMe=CMe-CH2(4a - d). The structure of4ahas been determined by X-ray diffraction.

* Sonderdruckanforderungen an Prof. Dr. W. Malisch; Fax: +49 931 8884618, E-mail: Wolfgang.Malisch@mail.uni-wuerzburg.de

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