ISSN:
0009-2940
Schlagwort(e):
Metallocene complexes, group-4
;
Metallocene cations hydrocarbyl
;
Dinuclear complexes main-group
;
transition-metal
;
Carbometallation
;
Chemistry
;
Inorganic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The methylzirconocene cation, employed as the [Cp2ZrCH3(THF)]+BPh4- reagent 1a reacts with (R′C≡C)2SiR2 substrates (6a-d) by means of carbometallation of an alkynyl group to yield the mixed metal ring systems 8a-d, containing both a 1,1-disubstituted μ-alkenyl and an alkynyl bridge between zirconium and silicon (e.g. shown by X-ray crystal structure analyses of complexes 8a and 8c). A similar addition reaction takes place upon treatment of the (butadiene)zirconocene/tris(pentafluorophenyl)-borane 1:1 addition product 9 with (CH3-C≡C)2Si(CH3)2 (6c) to give 10. Here the incipient alkyl zirconocene cation character of the metallocene/borate betaine complex 9 shows up in the alkynyl silane carbometallation reaction.
Zusätzliches Material:
2 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/cber.19961290103
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