期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 663, 期 1-2, 页码 289-296出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0022-328X(02)01961-7
关键词
thallium; silver; aryl transfer; phosphine oxide; pentafluorophenyl complexes; crystal structures
[NBu4][Ag(C6F5)(2)] or [Ag(C6F5)] act as arylating ligands able to transfer two or one pentafluorophenyl groups to [Tl(C6F5)(2)Cl] leading to [NBu4][Tl(C6F5)(4)] (1) and [Tl(C6F5)(3)(diox)] (diox = 1,4 dioxane) (2) in an improved synthesis, the latter being a starting material for the synthesis of [Tl(C6F5)(3)(OPPh3)] (3) and [Tl(C6F5)(3)(PPh3)] (4). However, [Ag(C6F5)L] does not transfer the pentafluorophenyl group when reacted with [Tl(C6F5)(2)Cl] and the complexes [Tl(C6F5)(2)Cl(py)](2) (5), [Tl(C6F5)(2)Cl(OPPh3)](2) (6) and [Tl(C6F5)(2)(OdppmO)(2)][Tl(C6F5)(2)Cl-2] (7) are obtained as the main products, which can be obtained in a better yield by the addition of the neutral ligands to [Tl(C6F5)(2)Cl]. The X-ray structure of complexes 3, 6 and 7 show thallium(III). centres in a tetrahedral, trigonal bipyramidal or octahedral arrangements, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.
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