Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK.
Dalton Trans. 2019 Feb 26;48(9):2896-2899. doi: 10.1039/c9dt00228f.
The interactions of the O-H bonds in alcohols, water and phenol with dimethylxanthene-derived frustrated Lewis pairs (FLPs) have been probed. Within the constraints of this backbone framework, the preference for adduct formation or O-H bond cleavage to give the corresponding zwitterion is largely determined by pKa considerations. In the case of the PPh2/B(C6F5)2 system and p-tBuC6H4OH, an equilibrium is established between the two isomeric forms which allows the thermodynamic parameters associated with zwitterion formation via O-H bond cleavage to be probed.
已经研究了醇、水和苯酚中的 O-H 键与二甲基金葱衍生的受阻路易斯对（FLP）的相互作用。在这个骨干框架的限制内，加成物形成或 O-H 键断裂以生成相应的两性离子的偏好主要取决于 pKa 的考虑。在 PPh2/B(C6F5)2 体系和 p-tBuC6H4OH 的情况下，建立了两种异构形式之间的平衡，这使得可以探测通过 O-H 键断裂形成两性离子的热力学参数。
