Structural insight into the reaction mechanism of Pd-catalyzed nitrile hydration: Trapping the [Pd(H2O)4]2+ cation through a supramolecular complex
作者:Francisco Ramón Fortea-Pérez、Francesco Neve、Donatella Armentano、Giovanni De Munno、Salah-Eddine Stiriba、Miguel Julve
DOI:10.1016/j.ica.2016.01.002
日期:2016.3
Abstract Four new bis(oxamato)palladate(II) complexes of formula (n-Bu4N)2[Pd(2,4,6-Me3pma)2]·2CH3CN (1), (n-Bu4N)2[Pd(2,4,6-Me3pma)2]·2CH3CONH2 (2) and (n-Bu4N)4[Pd(H2O)4][Pd(4-Xpma)2]3·2CH3CONH2 with X = Br (3) and Cl (4) (2,4,6-Me3pma = N-2,4,6-trimethylphenyloxamate, 4-Brpma = N-4-bromophenyloxamate, N-4-chlorophenyloxamate and n-Bu4N+ = tetra-n-butylammonium) have been obtained and characterized
摘要四种新的式(n-Bu4N)2 [Pd(2,4,6-Me3pma)2]·2CH3CN(1),(n-Bu4N)2 [Pd(2, 4,6-Me3pma)2]·2CH3CONH2(2)和(n-Bu4N)4 [Pd(H2O)4] [Pd(4-Xpma)2] 3·2CH3CONH2,X = Br(3)和Cl(4 )(2,4,6-Me3pma = N-2,4,6-三甲基苯基草酸酯,4-Brpma = N-4-溴苯基草酸酯,N-4-氯苯基草酸酯和n-Bu4N + =四正丁基铵)通过单晶X射线衍射表征。它们都含有双(草酸)钯(II)阴离子和庞大的n-Bu4N +阳离子,但是化合物3和4也具有不常见的[Pd(H2O)4] 2+无机阳离子。乙腈和有吸引力的乙酰胺分别作为晶格分子存在于化合物(1)和(2-4)中。1是在中性溶液中制备的,而2–4是在碱性介质中获得的。乙酰胺分子是草酸盐-钯(II)络合过程中乙腈