【摘要】 合成了通式为[（Ph₃P=O）₄LnCl₂][CuCl₂]（Ln=La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、He、Er、Y）的新配合物共12个,测定了它们的红外光谱(100～4600m^-1)和部分配合物的³¹P NMR.比较了[（Ph₃P=O）₄LnCl₃]、[（Ph₃P=O）₄LnCl₂]⁺和[（Ph₃P=O）₅LnCl]²⁺的P=O伸缩振动频率.结果表明希土配合物的正电荷越高,P=O基对希土离子配合能力越强,P=O伸缩振动频率更多地移向低波数,ν_P=O的顺序为:[（Ph₃P=O）₄LnCl₃]>[（Ph₃P=O）₄LnCl₂]⁺≥[（Ph₃P=O）₅LnCl]²⁺.讨论了希土配位键的共价性。更多还原

【Abstract】 A series of new complexes with the general formula of [(Ph3P = O4LnCl]2[CuCl2] (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er. and Y) has been prepared and characterized. The 31P NMR showed a chemical shift for coordinated Ph3P = O at 37.0 ppm in lower field compared to the chemical shift for free Ph3P = O The vp = o in IR of these complexes were compared with those for (Ph,P = O)4LnCl,. [(Ph,P=O)4LnCl2]+ and [(Ph3P=O),I.nCl]2+. It was observed that the more the positive charge was on the lanthanidc complex, the stronger the coordination of P = O group to lanthanidc was, and the vp = 0 moved to lower wave number. The vp=0 for these complexes were arranged in the following order:(Ph3P = O)4LnCl3>[(Ph3P = O)4LnCI2]>[(Ph3P = O)5LnCl]2+It was observed also that the Ln-Cl stretching frequency appeared at 230-241cm-1 (for Ln = La-Er) and at 265cm-1 (for Y) and the Cu-Cl stretching and distortion frequencies appeared at 409-412 and 108-114cm-1, respectively.更多还原