Synthesis of tantalum fluoride complexes supported by bis(trimethylsilyl)benzamidinate ligands. X-ray structures of [PhC(NSiMe3)(2)](2)TaF3 and [PhC(NSiMe3)(2)](2)TaFPh2

Authors
Mullins, SM Hagadorn, JR Bergman, RG Arnold, J
Citation
Sm. Mullins et al., Synthesis of tantalum fluoride complexes supported by bis(trimethylsilyl)benzamidinate ligands. X-ray structures of [PhC(NSiMe3)(2)](2)TaF3 and [PhC(NSiMe3)(2)](2)TaFPh2, J ORGMET CH, 607(1-2), 2000, pp. 227-232
Citations number
36
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF ORGANOMETALLIC CHEMISTRY
ISSN journal
0022328X → ACNP
Volume
607
Issue
1-2
Year of publication
2000
Pages
227 - 232
Database
ISI
SICI code
0022-328X(20000811)607:1-2<227:SOTFCS>2.0.ZU;2-Y
Abstract
The reaction of [PhC(NSiMe3)(2)]Li(TMEDA) with TaF5 yields complex 1, [PhC( NSiMe3)(2)](2)TaF3, in 40% isolated yield. The solid-state structure of 1 s hows a pentagonal, bipyramidal coordination geometry. Variable temperature F-19-NMR experiments reveal one singlet at an ambient temperature; decoales cence to two singlets (1:2 integration) is observed at - 20 degrees C. Comp lex 1 reacts with Me2Mg to produce [PhC(NSiMe3)(2)](2)TaMe3 (2). The reacti on of 1 with Ph2Mg yields [PhC(NSiMe3)(2)](2)TaF2Ph (3) and [PhC(NSiMe3)(2) ](2)TaFPh2 (4). Characterization of 4 by X-ray crystallography shows a liga nd arrangement similar to that of 1. (C) 2000 Elsevier Science S.A. All rig hts reserved.