Synthesis, Structure and Reactions of the Homoleptic Alkyne Nickel(0) Complex (Alkyne)
<sub>4</sub>
Ni
<sub>3</sub>
(Alkyne: 2‐methyl‐4‐trimethylsilyl‐3‐butyn‐2‐ol)
作者:Thomas Klettke、Dirk Walther、Andreas Schmidt、Helmar Görls、Wolfgang Imhof、Wolfgang Günther
DOI:10.1002/cber.19961291210
日期:1996.12
equivalents of 2-methyl-4-trimethylsilyl-3-butyn-2-ol leads to the selective formation of the homoleptic complex (alkyne)4Ni3 (compound 3), which can be isolated in excellent yields. The solid-state structure of 3 exhibits three Ni centers, forming a bent Ni3 chain connected by two bridging alkynes. The other two alkynes are terminally coordinated. Additionally, the trimeric units are stabilized by three intramolecular
用2当量的2-甲基-4-三甲基甲硅烷基-3-丁炔-2-醇处理(cdt)Ni(cdt:环十二烷基-1,5,9-三烯)导致选择性形成均纯络合物(炔烃)4 Ni 3(化合物3),可以优良的产率分离出来。的固态结构3个展品3个的Ni中心,形成一个弯曲的Ni 3链连接由两个桥接炔烃。其他两个炔烃是末端配合的。另外,三聚体单元通过三个分子内氢键稳定。两个分子间氢键连接三聚体单元以形成聚合物绳。根据THF中的13 C-和1 H-NMR光谱,该配合物的结构溶液中的3与固态相似。的反应3与一些炔二醇并用2,5,5- trimethylhex -3-炔-2-醇,得到式(炔)的化合物2的Ni。婴儿床(cot:1,3,5,7-cyclooctatetraene)将3转化为[(cot)Ni] 2,后者进而与2,5-二甲基己基-3-炔-2,5-二醇反应形成二聚体复合物(炔)2 Ni 2(cot)6。对6的X射线分析揭