substituent groups incorporating olefinic bonds have been synthesised (R = CH2:CH·CH2, CH2:CH·CH2·CH2, and CH2:CH·CH2·CH2·CH2) and the formation constants of their complexes with H+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, and Ag+ measured at 25 °C and I= 0·10M. Chelate formation takes place between the Ag+ ion and the ligands able to form chelate rings which are ‘four-and-a-half’ membered or larger. There is no
多个取代的
丙二酸RCH(CO 2 H)2,
乙酸RCH 2 CO 2 H和
亚氨基二乙酸RN(CH 2 CO 2 H)2。合成了含有结合有烯键的取代基的化合物(R = CH 2:CH·CH 2,CH 2:CH·CH 2 ·CH 2和CH 2:CH·CH 2 ·CH 2 ·CH 2),其形成常数与H +,Co 2 +,Ni 2 +,Cu 2 +,Zn的配合物在25°C和I = 0·10 M的条件下测量2 +,Cd 2+和Ag +。螯合物的形成发生在Ag +离子与能够形成“四半”或更大的螯合环的
配体之间。没有证据表明所研究的其他
金属离子会形成螯合物。在温度范围内的电位测量显示形成中的Ag + -allylacetate单复杂是一个大有利的焓变的结果(-17·5千焦耳摩尔-1由熵变化相对)( Ť Δ小号= -6·在25°C时为0 kJ mol –1)。