LCC-CNRS, Université de Toulouse, CNRS, 31077 Toulouse, France.
Molecules. 2020 May 9;25(9):2231. doi: 10.3390/molecules25092231.
The chemistry of NHCcore pincer ligands of LX type bearing two pending arms, identical or not, whose coordinating center is anionic in nature, is here reviewed. In this family, the negative charge of the coordinating atoms can be brought either by a carbon atom via a phosphonium ylide (RP-CR) or by a heteroatom through amide (RN), oxide (RO), or thio(seleno)oxide (RS, RSe) donor functionalities. Through selected examples, the synthetic methods, coordination properties, and applications of such tridentate systems are described. Particular emphasis is placed on the role of the donor ends in the chemical behavior of these species.
本文综述了具有两个相同或不同悬垂臂的 LX 型 NHC 核钳形配体的化学性质，其配位中心本质上是阴离子。在这个家族中，配位原子的负电荷可以通过磷叶立德（RP-CR）由碳原子提供，也可以通过酰胺（RN）、氧化物（RO）或硫（硒）氧化物（RS、RSe）供体官能团提供。通过选择的实例，描述了此类三齿体系的合成方法、配位性质和应用。特别强调了供体末端在这些物种化学行为中的作用。
