【摘要】 合成了 1 对氯苯基 3 苯基 4 (α 呋喃甲酰基 )吡唑啉酮 5 (HL)及其Cu(Ⅱ )、Pb(Ⅱ )、Cr(Ⅲ )和Fe(Ⅲ )配合物。根据元素分析、化学方法、摩尔电导结果推出配合物的组成为 [ML2 ]和 [ML3 ]。通过红外光谱、核磁共振谱、紫外 可见光谱、差热 热重分析和极谱对其配位结构、一般性质和电化学行为进行了研究。结果表明 ,配体以酮式结构存在 ,配位后转变为烯醇式结构 ,并以羰基和烯醇羟基O原子与中心离子成键 ,Pb(Ⅱ )配合物在 - 0 5 0V产生配位吸附波。电极反应为可逆反应 ,Pb2 + 得到 2个电子被还原更多还原

【Abstract】 A novel β-diketone compound, 1-(p-chloro-phenyl)-3-phenyl-4-(α-furoyl)pyrazolone-5(HL) and its Pb(Ⅱ), Cu(Ⅱ), Cr(Ⅲ) and Fe(Ⅲ) complexes were synthesized. The general formula of the complexes were [ML 2] and [ML 3], based on the elemental analysis, chemical methods and molar conduc- tance results. The coordinational structure, property and electrochemical behaviour of the complexes were studied by IR, UV-visible, 1H NMR, 13C NMR,TG-DTA, and polarography. The results show that the ligand in a keto-form structure is changed into an enol form structure after coordination and bonded to the central ions by the O atom of the carbonyl group and enolic hydroxyl group; polarographic analysis illustrated that the complex of Pb(Ⅱ) has a coordination adsorption wave at -0.50 V and the electrode reaction is a reversible two-electron reduction process.更多还原