【摘要】 用光谱法研究了Ni[(C4H9O) 2 PS2 ]2 与咪唑、邻菲咯啉在乙醇溶液中的加合反应 ,测定了反应的平衡常数lgβn 及加合分子数n ,在 32℃时 ,与咪唑反应lgK1 =2 .85± 0 .0 7,lgβ2 =5.69± 0 .0 9;与邻菲咯啉反应lgβ2 =7.68± 0 .1 1 比较了咪唑与吡啶类化合物的平衡常数值的大小 ,得到了平衡常数值不仅与氮碱的 pKa值有关 ,而且和其空间效应有关的重要结论更多还原

【Abstract】 Adductive reaction of Ni[(C 4H 9O) 2PS 2] 2 with Imidazole and 1,10 Phenanthroline in Ethanol has been studied spectrophotometrically. The equilibrium constants with Imidazole and 1,10 phenanthroline are found to be lg K 1=2.85±0.07, lg β 2=5.69±0.09 and lg β 2=7.68±0.11 respectively. The equilibrium constants of Imidazole have been compared with the equilibrium constants of pyridine and some of its derivatives.The results have demonstrated that equilibrium constants are concerned with not only pKa of nitrogen bases but also the space effect of nitrogen bases.更多还原