摘要
本文研究了银的不同配合物与N_2H_4的反应,得出微量的Cu^(2+)不仅能加快反应速度,能有效地促进N_2H_4按反应(4)进行四电子定向反应的比率,而且N_2H_4按四电子定向的反应率随银配合物稳 4Ag^+(AgL_2^(q±))+N_2H_4(?)4Ag+N_2+4H^+(+8L~[q±(～1)]/~2) (4) Ag^+(AgL_2^(q±))+N_2H_4(?)Ag+l/2N_2+H^+(+2L~[q±(～1)]/~2) (5) 定常数的增大而降低的结论。无Cu^2+时,N_2H_4的四电子反应率与银配合物的logβ_2成线性关系;Cu^2+存在时,N_2H_4单电子反应率的对数与1/logβ_2呈线性关系。
The reaction of hydrazine with several silver coordination compounds has been studied. We found that a trace amount of copper (Ⅱ) ion is an effective catalyst. In the presence of copper (Ⅱ) ion, the rate of reaction is accelerated, and the ratio of fourelectron directional reaction of hydrazine (reaction 4) is greatly increased. With the 4 Ag^+(AgL_2^(q±))+N_2H_4(?) 4Ag+N_2+4H^+(+8L~〔q±(-1)〕/2) (4) Ag^+(AgL_2^(q±))+N_2H_4(?)Ag+I/2N_2+NH_3+H^+(+2L~〔q±(-1)/2) (5) increase of the stability constants (β_2) of several silver coordination compounds, the ratio of four-electron reaction of hydrazino is decreased. The ratio of four-electron reaction against logβ_2 of several silver coordination compounds is linear in the absence of copper (Ⅱ) ion. In the presence of copper (Ⅱ) ion, the logarithm of the ratio of one-electron reaction of hydrazine is proportional to 1/logβ_2.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第2期127-131,共5页
Acta Chimica Sinica
基金
国家自然科学基金
