Reversible ring opening and closure reactions of the triazine ligands derived from 1-phenylazo-2-naphthylamine and pyridine-2-aldehyde or quinoline-2-aldehyde – structure and reactivity of the palladium (II) complexes
作者:Zhicheng Zhu、Masaaki Kojima、Kiyohiko Nakajima
DOI:10.1016/j.ica.2004.08.024
日期:2005.2
concentrated reaction mixture. In this reaction, the dihydrotriazine ring of the didentate L2 ligand in complex 2 opened and the resulting tridentate L4b ligand coordinated to the Pd atom in complex 5. When an excess amount of (nBu)4NCl was added to complex 5 in dichloromethane, the absorption spectrum reverted to that of complex 2. Thus, the reversible ring opening and closure reactions of the coordinating
摘要含有杂环的新配体L1(1-苯胺基-2-(2-吡啶基)-萘[1,2-d]咪唑-1-io-3-ide),L2(2-苯基-3-( 2-吡啶基)-3,4-二氢萘并[2,1-e] [1,2,4]三嗪-1-io-4-ide)和L3(1-苯胺基-2-(2-喹啉基) )-萘[1,2-d]咪唑-1-io-3-ide)及其钯(II)配合物已经制备。配体和配合物的结构通过X射线晶体学测定。[PdCl2(Ln)](n = 1(1),n = 2(2)和n = 3(3))的单核方平面复合物具有Ln(n = 1-3)配体。Ln(n = 1-3)配体稳定,在二氯甲烷和甲醇中其吸收光谱不变。另一方面,当向溶液中添加甲醇时,[PdCl2(L2)](2)在二氯甲烷中的吸收光谱迅速变化,从浓缩的反应混合物中获得[PdCl(L4b)](5)(L4b = N- [甲氧基(2-吡啶基)甲基] -1-(苯基偶氮)-2-萘酰胺)。