ISSN:
0009-2940
Keywords:
Alkynyl groups
;
Palladium, trimethylphosphane complexes
;
Trimerization, oxidative
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Oxidative Trimerization of Alkynyl Groups at Trimethylphosphane Palladium ComplexesAlkynylpalladium halides trans-PdX (C ≡ CR)(PMe3)2 [1, 2, 4, X = Cl, R = SiMe3, (CH2)2CH3, (CH2)5CH3; 3, X = Br, R = (CH2)2CH3] were synthesized by routine methods, while further examples of the series trans-PdX (C ≡ CR)(PMe3)2 [5, 7, 8, 10, X = Br, R = SiMe3, CMe3, (CH2)2CH3, Ph; 7, 9, 11, X = I, R = SiMe3, SiPh3, OEt] and trans-PdX (C ≡ CR)(PPh3)2 (12-14, X=I, R=SiMe3, CMe3, CH2OH) were obtained by oxidative addition of 1-halogeno-1-alkynes to PdL4 (L=PMe3, PPh3). Just above the melting point or decomposition point 5-7 are transformed by oxidative trimerization of the alkynyl groups to give enediynyl complexes trans-PdX[C(C ≡ CR)=C(C ≡ CR)R](PMe3)2 (15, 16, R=SiMe3, X=Br, I; 17, X=Br, R=CMe3). According to an X-ray structure analysis 17 has E configuration.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19921250103
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