Reaction of 1,3,5‐Triazacyclohexanes with TiCl
<sub>4</sub>
: Formation of Cationic Complexes
作者:Randolf D. Köhn、Philip Kampe、Gabriele Kociok‐Köhn
DOI:10.1002/ejic.200500122
日期:2005.8
p-fluorobenzyl or Ph(CH2)n (n = 1, 2, 3)] react with excess TiCl4 to give the corresponding cationic κ3 complexes [(R3TAC)TiCl3][Ti2Cl9]. Attempts to prepare complexes with titanium-free anions at lower Ti:R3TAC ratio or with added Me3SiOTf lead to the same cations with [Ti2Cl10]2– and [Ti2Cl8(OTf)]– anions. Five complexes as well as (p-fluorobenzyl)3TAC have been characterised by X-ray crystallography. The
N-取代的 1,3,5-三氮杂环己烷 [R3TAC; R = 环己基、对氟苄基或 Ph(CH2)n (n = 1, 2, 3)] 与过量的 TiCl4 反应生成相应的阳离子 κ3 配合物 [(R3TAC)TiCl3][Ti2Cl9]。尝试以较低的 Ti:R3TAC 比率或添加 Me3SiOTf 与不含钛的阴离子制备配合物会导致与 [Ti2Cl10]2- 和 [Ti2Cl8(OTf)]- 阴离子相同的阳离子。五种配合物以及 (p-fluorobenzyl)3TAC 已通过 X 射线晶体学表征。环 C-H 键参与晶体中的氢键相互作用,并在溶液中检测到强烈的溶剂和阴离子依赖性 1H NMR 信号。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)