Use of Microwave Dielectric Spectroscopy for the In Actu Assessment of Frustrated Lewis Pair Encounter Complexes,Journal of the American Chemical Society

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Use of Microwave Dielectric Spectroscopy for the In Actu Assessment of Frustrated Lewis Pair Encounter Complexes
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2024-07-16 , DOI: 10.1021/jacs.4c02736
Cihang Yu ₁ , Jamie A Leitch ₁ , Lukas Gierlichs ₂ , Sampurna Das ₂ , Adrian Porch ₃ , Rebecca L Melen ₂ , Duncan L Browne ₁

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Frustrated Lewis pairs (FLPs) offer an important and promising paradigm for main group catalysis. Reported here is the use of microwave dielectric spectroscopy for the in actu detection of FLP encounter complexes. This technique focuses on the room-temperature measurement of the loss component of microwave permittivity (ε₂) over the bandwidth from 0.5 to 6.8 GHz. The microwave loss measured for a Lewis pair in a toluene host solution is compared with the losses of the individual components when measured separately, and the difference in loss Δε₂ is used to characterize the electrostatic interaction between the pair. The Δε₂ value shows a direct correlation with an ability for the FLP encounter complex to split hydrogen gas and abstract hydrogen from γ-terpinene and has led to the identification of a novel FLP encounter complex, tris-pentafluorophenyl borane-eucalyptol pairing.

中文翻译：

使用微波介电谱对受阻路易斯对相遇复合物进行实际评估

受阻路易斯对（FLP）为主基团催化提供了一个重要且有前途的范例。这里报道的是使用微波介电谱来实际检测 FLP 遇到复合物。该技术重点关注 0.5 至 6.8 GHz 带宽内微波介电常数 (ε ₂ ) 损耗分量的室温测量。将在甲苯基质溶液中测量的路易斯对的微波损耗与单独测量时各个组分的损耗进行比较，并且损耗的差异Δε ₂用于表征对之间的静电相互作用。 Δε ₂值显示与FLP相遇复合物分裂氢气和从γ-萜品烯中提取氢的能力直接相关，并导致鉴定出新型FLP相遇复合物，三-五氟苯基硼烷-桉树油配对。

更新日期：2024-07-16

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