作者:Boris Neuwald、Lucia Caporaso、Luigi Cavallo、Stefan Mecking
DOI:10.1021/ja3101787
日期:2013.1.23
synthesized. Analyses of molecular motions and dynamics by variable temperature NMR studies and line shape analysis were performed for the free ligands and the complexes. The highest barriers of ΔG(‡) = 44-64 kJ/mol were assigned to an aryl rotation process, and the flexibility of the ligand framework was found to be a key obstacle to a more effective stereocontrol. An increase of steric bulk at the aryl substituents
各种膦磺酸基配体和相应的钯配合物 [((P^O)PdMeCl)-μ-M}(n)] ([((X)1-Cl)-μ-M}(n)], (P ^O) = κ(2)-P,O-Ar(2)PC(6)H(4)SO(2)O) 对称 (Ar = 2-MeOC(6)H(4), 2-CF (3)C(6)H(4), 2,6-(MeO)(2)C(6)H(3), 2,6-(iPrO)(2)C(6)H(3), 2-(2',6'-(MeO)(2)C(6)H(3))C(6)H(4)) 和不对称取代的磷原子 (Ar(1) = 2,6-(MeO) )(2)C(6)H(3),Ar(2) = 2'-(2,6-(MeO)(2)C(6)H(3))C(6)H(4);合成了 Ar(1) = 2,6-(MeO)(2)C(6)H(3)、Ar(2) = 2-cHexOC(6)H(4))。通过变温 NMR 研究和线形分析对自由配体和配合物进行分子运动和动力学分析。ΔG(‡)