Analysis of Ion Pairing in Solid State and Solution in <i>p</i>-Cymene Ruthenium Complexes
作者:Marta Martı́nez-Alonso、Pedro Sanz、Paula Ortega、Gustavo Espino、Félix A. Jalón、Mairena Martín、Ana M. Rodrı́guez、José A. López、Cristina Tejel、Blanca R. Manzano
DOI:10.1021/acs.inorgchem.0c01951
日期:2020.10.5
anion–cation interactions in the solid state mainly based on N–H···X (X = Cl, F, O) and C–H···π interactions, also observed in the DFT-modeled complexes in the gas phase. Moreover, NMR studies showed that they exist as intimate ion pairs in solution and, remarkably, as head-to-tail quadruples in the particular case of the cation [(p-cym)Ru(MeIm)(κ2- O^N–L1)]+ ([1]+) with Cl– and BPh4– as counteranions
离子对在不同化学领域的重要性已得到广泛认可。在这项工作中,我们已经合成了一组阳离子的p通式-cymene钌络合物[(p -cym)的Ru(L')(κ 2 -O ^ N-L)] X(p -cym = p -cymene ; L'= N-甲基咪唑(MeIm),N-乙基哌啶基咪唑(EpipIm),1,3,5-三氮杂-7-磷酸金刚烷(PTA); L = 2-(1H-苯并咪唑-2-基)苯酚(L1) ,2-(1,3-苯并噻唑-2-基)酚基(L2); X = Cl –,BF 4 –,OTf –,BPh 4 –)。对选定配合物的X射线衍射研究表明,固态中主要是基于N–H···X(X = Cl,F,O)和C–H···π相互作用而形成的相对较强的阴离子-阳离子相互作用,也观察到在气相中以DFT模拟的络合物中。此外,NMR研究表明,它们在溶液中的亲密离子对存在和,值得注意的是,作为头-尾四倍在阳离子的具体情况下[(p