Aryltellurenyl Cation [RTe(CR′
<sub>2</sub>
)]
<sup>+</sup>
Stabilized by an N‐Heterocyclic Carbene
作者:Jens Beckmann、Pamela Finke、Stephan Heitz、Malte Hesse
DOI:10.1002/ejic.200800038
日期:2008.4
(mixed-valent) aryltellurenyl halidesRTeTeCl2R (1), RTeTeBr2R (2) and RTeI (3, R = 2,6-Mes2C6H3) with 1,3,4,5-tetramethylimidazol-2-ylidene (CR′2) provides cationic aryltellurenyl carbene complexes of the type [RTe(CR′2)]+ A– (4, A = RTeCl2; 5, A = RTeBr2; 6, A = I). The stabilization energy and natural charge distribution of the model cation [PhTe(CR′2)]+ as well as the related σ-donor-stabilized cations [PhTe(PMe3)]+
(混合价)芳基碲烯基卤化物RTeTeCl2R (1)、RTeTeBr2R (2)和RTeI (3, R = 2,6-Mes2C6H3)与1,3,4,5-四甲基咪唑-2-亚基(CR'2)的反应) 提供 [RTe(CR'2)]+ A– (4, A = RTeCl2; 5, A = RTeBr2; 6, A = I) 类型的阳离子芳基碲烯基卡宾配合物。模型阳离子 [PhTe(CR'2)]+ 以及相关的σ-供体稳定阳离子 [PhTe(PMe3)]+, [I(CR'2)]+, [ I(PMe3)]+ 通过 DFT 计算和 NBO 分析进行研究。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)