Mechanochemical Regulation of Oxidative Addition to a Palladium(0) Bisphosphine Complex
作者:Liqi Wang、Yichen Yu、Anton O. Razgoniaev、Patricia N. Johnson、Chenxu Wang、Yancong Tian、Roman Boulatov、Stephen L. Craig、Ross A. Widenhoefer
DOI:10.1021/jacs.0c08506
日期:2020.10.14
bisphosphine ligand on the rate of oxidative addition of bromobenzene to a ligand-coordinated palladium center. Local compressive and tensile forces on the or-der of 100 pN were generated using a stiff stilbene force probe. A compressive force increases the rate of oxidative addition, whereas a tensile force decreases the rate, relative to that of the parent complex of strain-free ligand. Rates vary
在这里,我们报告了施加到双膦配体的联芳基主链上的力对溴苯氧化加成到配体配位钯中心的速率的影响。使用刚性二苯乙烯力探针产生大约 100 pN 的局部压缩力和拉伸力。相对于无应变配体的母体复合物,压缩力增加氧化加成速率,而拉伸力降低速率。在施加到复合物的约 340 pN 力范围内,速率变化约 6 倍。晶体结构和 DFT 计算支持力引起的反应物几何结构的扰动可以忽略不计。观察到的力-速率关系主要归因于力与包含反应坐标的核运动的耦合。