Formation of niobium and tantalum ylide complexes

被引：2
|
作者：
Wang, Aichen [1 ]
Sun, Hongjian [1 ]
Wang, Liang [1 ]
Li, Xiaoyan [1 ]
机构：
[1] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China
来源：
JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2008年 / 693卷 / 16期
基金：
美国国家科学基金会;
关键词：
phosphorus ylide; tantalum; cyclopentadienyl ligand; pentamethylcyclopentadienyl ligand;
D O I：
10.1016/j.jorganchem.2008.05.007
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The reactions of tri(bis(ethyl) amino) phosphorus ylide (Et2N)(3)P=CH2 with cyclopentadienyl (Cp) metal (V) tetrachloride CpMCl4 (M = Nb 1; Ta 3) and pentamethylcycopentadienyl (Cp*) metal (V) tetrachloride Cp*MCl4 (M = Nb 2; Ta 4) were investigated. The hexa-coordinate ylide adducts complexes 5 (CpNbCl4(H2C=P(NEt2)(3))), 6 (Cp*NbCl4(H2C=P(NEt2)(3))) and 8 (Cp*TaCl4(H2C=P(NEt2)(3))) with pseudooctahedral geometry were structurally analyzed with X-ray diffraction. Compound 4 (Cp*TaCl4) reacted with three molar equivalent of phosphorus ylide to form one ionic complex 9 ([H3C-P(NEt2)(3)][Cp*TaCl5]) which was also structurally analyzed with X-ray diffraction. The possible formation mechanism of compound 9 has been discussed. (c) 2008 Elsevier B. V. All rights reserved.
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页码：2679 / 2682
页数：4
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