摘要
由气相色谱流出气体分析数据,采用Coats—Redfern公式计算了三溴化一水五氨合钴、三硝酸一水五氨合铬(Ⅲ)、六氰合钴酸一水五氨合钴与氢氧化钾双起始组分固相反应活化能,结果表明固体氢氧化钾使上述配合物氨配体解离活化能大幅度降低,导致氨配体与配位水同时逸出。
Gas chromatography is used to measure the solid state reaction activation parameters of aquopentaammine complexes of cobalt(Ⅲ) and chromium(Ⅲ) with potassium hydroxide. The evolved gas analysis curves of the solid state reaction products are treated according to Coats-Redfern equation. Deammine activation energy of aquopentaamminecobalt(Ⅲ) tribromide decreases from 150 KJ/mole to 82 Kj/mole in the presence of potassium hydroxide, and for aquopentaamminechromium(Ⅲ) trinitrate, the change is from 183kJ/mole to 124 kJ/mole. The decrease of deammine activation energie、leads to dissociation of ammine occuring with water in the same step over temperatures from 80° to 120℃. The results have been interprepted on the basis of hydrogen bond formation in the presence of potassium hydroxides.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1991年第3期475-482,共8页
Journal of Nanjing University（Natural Science）
基金
国家自然科学基金
教委博士点基金
关键词
固相反应
络合物
活化能
配估化学
Gas chromatography
solid state reaction
aquopentaaminecobalt(Ⅲ) tribromide
Aquopentaammine-chromium(Ⅲ) trinitate
potassium hydroxide
