Synthesis and Characterization of Metallomacrocyclic Palladium(II) Complexes with New Hybrid Pyrazole Ligands. Diffusion NMR Studies and Theoretical Calculations
作者:Miguel Guerrero、Josefina Pons、Vicenç Branchadell、Teodor Parella、Xavier Solans、Mercè Font-Bardia、Josep Ros
DOI:10.1021/ic8013915
日期:2008.12.1
5-dimethylpyrazolic hybrid ligands N1-substituted by polyether chains and phenyl groups have been synthesized: 1,2-bis[4-(3,5-dimethyl-1H-pyrazol-1-yl)-2-oxabutyl]benzene (L1), 1,3-bis[4-(3,5-dimethyl-1H-pyrazol-1-yl)-2-oxabutyl]benzene (L2), and 1,4-bis[4-(3,5-dimethyl-1H-pyrazol-1-yl)-2-oxabutyl]benzene (L3). The reaction of these ligands with [PdCl(2)(CH(3)CN)(2)] gives two kinds of complexes, monomer or dimer
合成了三个新的被聚醚链和苯基取代的3,5-二甲基吡唑杂配体N1-:1,2-双[4-(3,5-二甲基-1H-吡唑-1-基)-2-氧杂丁基]苯(L1),1,3-双[4-(3,5-二甲基-1H-吡唑-1-基)-2-氧杂丁基]苯(L2)和1,4-双[4-(3, 5-二甲基-1H-吡唑-1-基)-2-氧丁基]苯(L3)。这些配体与[PdCl(2)(CH(3)CN)(2)]的反应产生两种络合物,单体或二聚体,具体取决于溶剂。当反应的溶剂是乙腈,而反应是在四氢呋喃双核中进行时,则获得单体螯合的配合物[PdCl(2)(L)] [L = L1(1),L2(2),L3(3)]。形成化合物[PdCl(2)(L)](2)[L = L1(4),L2(5),L3(6)]。1和4的固态结构是通过单晶X射线衍射法确定的。分离并完全表征了所有钯(II)配合物1-6。已经进行了扩散NMR研究,以表征溶液中的单体和二聚体物种。二聚体化合物呈现复杂的(1)H