Aufsatz in einer Fachzeitschrift
Reduction of Terphenyltrifluorosilanes: C-C Insertion Products and Possible Formation of a Disilyne.



Details zur Publikation
Autor(inn)en:
Pietschnig, R.; West, R.; Powell, D.
Verlag:
American Chemical SocietyDO - 10.1021/om990924z
Publikationsjahr:
2000
Zeitschrift:
Organometallics
Seitenbereich:
2724-2729
Jahrgang/Band:
19
Erste Seite:
2724
Letzte Seite:
2729
ISSN:
0276-7333

Zusammenfassung, Abstract
Terphenyl trifluorosilanes, 2,6-Mes2C6H3SiF3 (1) and 2,6-Tip2C6H3SiF3 (2), were synthesized, and their redn. behavior was studied. Redn. with Na in both cases results in insertion of the Si center into C-C bonds of the substituent. The reactive intermediates giving rise to the C-C insertion most likely involve fluorosilylene or disilyne species. The final product is a bis-silafluorenyl (3) in the case of 1 and a silafluorenyl anion in the case of 2. The anion can be protonated to give a stable silafluorene. The redn. of 1 and 2 with K gives a completely different result, and radical species are formed instead. The different reaction pathway is probably caused by the existence of a poorly sol. intermediate [2Mes2C6H3SiF3·3KF] (10) that lowers the concn. of the starting material and therefore influences the reaction kinetics. Crystal structures are presented for 1, 2, the insertion product 3, and the intermediate adduct 10. [on SciFinder(R)]


Schlagwörter
crystal structure terphenyltrifluorosilane bissilafluorenyl hexacoordinate terphenylpentafluorosilicate intermediate, fluorosilicate terphenyl hexacoordinate pentacoordinate bridging potassium prepn crystal structure, mol structure terphenyltrifluorosilane bissilafluorenyl hexacoordinate terphenylpentafluorosilicate intermediate, silafluorenyl dimer prepn crystal structure, tetrafluorosilane lithiation condensation terphenyl halide


Autor(inn)en / Herausgeber(innen)

Zuletzt aktualisiert 2019-25-07 um 16:00