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 The addition reaction of Ni [(C4H9O) 2 PS2] 2 with imidazole and 1,10-phenanthroline in ethanol solution was studied spectrophotometrically. The reaction equilibrium constant lgβn and the number of adduct molecules n were determined. At 32 ℃, Imidazole reaction lgK1 = 2.85 ± 0. .0 7, lgβ2 = 5.69 ± 0. .0 9; and phenanthroline reaction lgβ2 = 7.68 ± 0.11 compared imidazole and pyridine compounds of the equilibrium constant value size, The equilibrium constant values ​​obtained are not only related to the pKa value of nitrogen and alkali, but also to the important conclusions related to their spatial effects