Ethylene and Styrene Carbon Monoxide Copolymerization Catalyzed by Pyrazolyl Palladium(II) Complexes
作者:Collins Obuah、Michael K. Ainooson、Sibulele Boltina、Ilia A. Guzei、Kyoko Nozaki、James Darkwa
DOI:10.1021/om300798y
日期:2013.2.25
[PdCl(Me)(cod)] gave the corresponding palladium(II) complexes [PdCl(Me)(L)] (where L = L1 (1a), L2 (2a), L3 (3a), L4 (4a), L5 (5a), L6 (6a)) in very good yields. The pyridylimine ligands L1 and L2 were found to coordinate via the imine and pyridine nitrogen atoms, while the thienylimine ligands L3–L6 coordinate via imine and pyrazolyl nitrogen atoms to the palladium. The cationic complexes [Pd(Me)(A)]+
吡唑基吡啶嘧啶配体[2-(3,5-二甲基吡唑-1-基)乙基]吡啶-2-基亚甲基亚胺(L1)和[2-(3,5-二叔丁基吡唑-1-基)乙基]吡啶-2-基亚甲基亚胺(L2)和吡唑基噻吩基亚胺配体[2-(3,5-二甲基吡唑-1-基)乙基]噻吩-2-基亚甲基亚胺(L3),[2-(3,5-二叔丁基-吡唑-1-基)乙基]噻吩-2-基亚甲基亚胺(L4),[2-(3,5-二甲基吡唑-1-基)乙基] -2-溴噻吩-2-基亚甲基亚胺(L5)和[2-( 3,5-二叔丁基吡唑-1-基)乙基] -2-溴噻吩-2-基亚甲基亚胺(L6通过适当的吡唑基胺和相应的醛的缩合来合成)。的反应L1 - L6与[的PdCl(ME)(COD)],得到相应的钯(II)配合物[的PdCl(ME)(L)](其中L = L1(图1A),L2(图2a),L3(图3a) ,L4(4a),L5(5a),L6(6a)),收率很高。发现吡啶亚胺配体L1