金二氟化苯的明确光谱表征。

IF 8.7 Q1 CHEMISTRY, MULTIDISCIPLINARY
JACS Au Pub Date : 2025-09-04 eCollection Date: 2025-09-22 DOI:10.1021/jacsau.5c00911
Miquel Navarro, Louise Delaurenti, Alejandra Pita-Milleiro, Jesús Campos
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引用次数: 0

摘要

金-(I)碳烯,定义为[LAuCR2]+,是催化过程中的关键中间体。它们的分离是具有挑战性的,因为碳烯的高亲电性不能仅仅通过金的π反给体来调节。其中,简单的二氟化苯复合体已在若干研究中被引用,但试图分离它的努力失败了,而它的鉴定仍然值得怀疑。在这项研究中,我们报告了金二氟化苯配合物[P-AuCF2]+的明确光谱表征,提供了对其结构和电子特征的关键见解。卡宾的动力学稳定是唯一可能的,因为一个拥挤的和空腔形状的磷化氢提供了屏蔽,防止分解在严格的无水条件下。此外,阴离子的性质是延长热稳定性的关键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Unambiguous Spectroscopic Characterization of a Gold Difluorocarbene.

Gold-(I) carbenes, defined as [LAuCR2]+, are key intermediates in catalysis. Their isolation is challenging due to the high electrophilic character of the carbene that cannot be tempered solely by π-backdonation from gold. Among those, the simple difluorocarbene complex has been invoked in several studies, but attempts to isolate it have failed, while its identification remains questionable. In this study, we report the unambiguous spectroscopic characterization of the gold difluorocarbene complex [P-AuCF2]+, providing key insights into its structural and electronic features. The kinetic stabilization of the carbene was only possible owing to the shielding offered by a congested and cavity-shaped phosphine that prevents decomposition under strict anhydrous conditions. Besides, the nature of the anion is key to provide further thermal stability for prolonged times.

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CiteScore
9.10
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