A new pincer ligand framework based on the commonly used “POCOP” (POCOP = κ³-C₆H₃-1,3-(OPR₂)₂, R = ^tBu, ⁱPr) motif is reported, in which two POCOP units are tethered using an anthracene linker to support bimetallic complexes. Metalation using Ir precursors affords products dictated by steric factors. A comparison of the reactivity of ^RPOCOP-supported Ir(I) carbonyl monomeric and dimeric species with alkyl halides is explored. For R = ^tBu, the complexes are unreactive, but for R = ⁱPr, both types of complexes react with alkyl halides to form Ir(III) products.

中文翻译：

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双金属（pin）Ir配合物的制备和反应性

根据常用的“POCOP”（POCOP =κ阿新钳形配体框架³ -C ₆ ħ ₃ -1,3-（OPR ₂）₂，R =^吨卜，^我PR）基序被报告，其中两个POCOP使用蒽接头将单元束缚以支持双金属配合物。使用Ir前驱物进行金属化可得到由空间因素决定的产物。探索了^R POCOP负载的Ir（I）羰基单体和二聚体物种与烷基卤的反应性的比较。对于R = ^t Bu，络合物是不反应的，但是对于R = ⁱ Pr，两种类型的络合物都与卤代烷反应形成Ir（III）产物。