We report the facile generation of Ir PC_carbeneP pincer systems. These systems are accessed from the reaction between [IrCl(COD)]₂ and a bis(diphenyl)phenylene P(OH)P proligand (1) with concomitant dehydration, followed by salt metathesis/ligand exchange in the case of cationic examples. In contrast to previously reported double C–H activation synthetic strategies to access similar complexes, accessing Ir PC_carbeneP complexes through dehydration proceeds rapidly at room temperature and provides the first example of the incorporation of phosphino aryl substituents. The generated complexes are shown to possess the ability to activate inert C–H bonds and partake in ligand cooperativity. Mechanistic evidence suggests that divergent C–H and O–H activation pathways of ligand 1 ultimately lead to the same Ir PC_carbeneP product (2). It is hoped that the stability and synthetic accessibility of these complexes will encourage their increased use in catalyst surveys.

中文翻译：

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通过从醇配体中除去水来轻松生成铱PC_卡宾P钳形配合物

我们报告了Ir PC_卡宾P钳系统的简便生成。这些系统从[IrCl（COD）] ₂与双（二苯基）亚苯基P（OH）P配体（1）之间的反应伴随脱水而进入，如果是阳离子实例，则进行盐复分解/配体交换。与先前报道的双重C–H活化合成策略以访问类似的络合物，使用Ir PC_卡宾相反通过脱水作用的P络合物在室温下迅速进行，并提供了膦基芳基取代基并入的第一个例子。生成的复合物具有激活惰性C–H键并参与配体协同作用的能力。机理证据表明，配体1的不同的C–H和O–H活化途径最终导致相同的Ir PC_卡宾P产物（2）。希望这些络合物的稳定性和合成可及性将鼓励它们在催化剂研究中的更多使用。