A Schiff base, 4-[2-(methylthio)anilino]-3-penten-2-one (Hmtap), prepared from acetylacetone and 2-(methylthio)aniline, reacted with Na2[PdCl4] in the presence of sodium ethoxide to give [PdCl(mtap-O,N,S)] (1). Complex 1 was treated with carbanions formed from dimethyl malonate, methyl cyanoacetate, and malononitrile in the presence of sodium methoxide to afford the corresponding (disubstituted methyl)palladium(II) complexes, [Pd(CHYY′)(mtap-O,N,S)] (Y,Y′=COOMe and/or CN). On the other hand, 1 reacted with Tl(acac) to yield an O,O′-chelating complex, [Pd(mtap-N,O)(acac)], in which the mtap moiety served as a bidentate ligand. Moreover, 1 reacted with 2,2′-bipyridine (bpy) and 4-(dimethylamino)pyridine (dmapy) in the presence of NaClO4·H2O to give [Pd(mtap-N,O)(bpy)]ClO4 and [Pd(mtap-O,N,S)(dmapy)]ClO4, respectively. These complexes are characterized by means of elemental analysis and IR and NMR spectroscopy.
由
乙酰丙酮和 2-(甲
硫基)
苯胺制备的希夫碱 4-[2-(甲
硫基)
苯胺基]-
3-戊烯-2-酮 (Hmtap),在
乙醇钠存在下与 Na2[PdCl4] 反应生成 [PdCl(mtap-O,N,S)](1)。在
甲醇钠存在下,络合物 1 与
丙二酸二甲酯、
氰乙酸甲酯和
丙二腈形成的碳离子进行处理,得到相应的(二取代甲基)
钯(II)络合物 [Pd(CHYY′)(mtap-O,N,S)](Y,Y′=COOMe 和/或 CN)。另一方面,1 与 Tl(acac)反应生成 O,O′-螯合复合物 [Pd(mtap-N,O)(acac)],其中的 mtap 分子是双齿
配体。此外,在 NaClO4-
H2O 存在下,1 与 2,2′-联
吡啶(bpy)和 4-(二甲基
氨基)
吡啶(dmapy)反应,分别得到 [Pd(mtap-N,O)(bpy)]ClO4 和 [Pd(mtap-O,N,S)(dmapy)]ClO4。这些复合物通过元素分析、红外光谱和核磁共振光谱进行表征。