Correlations and Contrasts in Homo- and Heteroleptic Cyclic (Alkyl)(amino)carbene-Containing Pt<sup>0</sup>Complexes
作者:Nicole Arnold、Holger Braunschweig、Peter B. Brenner、Mehmet Ali Celik、Rian D. Dewhurst、Martin Haehnel、Thomas Kramer、Ivo Krummenacher、Todd B. Marder
DOI:10.1002/chem.201502048
日期:2015.8.24
route to homoleptic complex [Pt(CAACMe)2] (CAAC=cyclic (alkyl)(amino)carbenes) and convenient routes to new heteroleptic complexes of the form [Pt(CAACMe)(PR3)] are presented. Although the homoleptic complex was found to be inert to many reagents, oxidative addition and metal‐only Lewis pair (MOLP) formation was observed from one of the heteroleptic complexes. The spectroscopic, structural, and electrochemical
提出了一种改进的合成方法,制备了均相复合物[Pt(CAAC Me)2 ](CAAC =环(烷基)(氨基)碳烯),并便捷地合成了新的[Pt(CAAC Me)(PR 3)形式的杂合复合物。。尽管发现同型配合物对许多试剂均呈惰性,但从其中一种杂合剂配合物中观察到了氧化加成反应和仅金属路易斯对(MOLP)的形成。与密度泛函理论(DFT)和时变密度泛函理论(TD-DFT)计算一起探索了零价配合物的光谱,结构和电化学性质。同功[Pt(CAAC)2 ]和同功[Pt(CAAC)(PR 3)]发现配合物的光谱和结构性质相似,但它们的电化学行为和反应性差异很大。通过TD-DFT计算研究了含CAAC的Pt 0配合物异常强的颜色,这归因于配合物的LUMO激发,其主要由Pt和CAAC碳原子之间的键π相互作用组成。