- 作者: 簡秋芬 ; 葉玉堂
- 作者服務機構: 中央大學化學系
- 中文摘要: The reactions of Fe(CN)/sub 5/dpa/sup 3-/ and Ru(NH/sub 3/)/sub 5/dpa/sup 2+/ (dpa=4,4'-dipyridylamine) with Co(edta)/sup -/ have been investigated kinetically. For Fe(CN)/sub 5/dpa/sup 3-/ complex, a linear relationship was observed between the pseudo-first-order rate constants and the concentrations of Co(edta)/sup -/ which leads to a specific rate 0.876.plmin.0.006/M-s at T=25.degree.C,.mu.=0.10M and pH=8.0. For the Ru(NH/sub 3/)/sub 5/ dpa/sup 2+/ system, the plots k/sub obs/ vs. [ Co( edta)/sup-/ ] become nonlinear at concentrations of Co(edta)/sup -/ greater than 0.01M and the reaction is interpreted on the basis of a mechanism involving the formation of an ion pair between Ru(NH/sub 3/)/sub 5/dpa/sup 2+/ and Co(edta)/sup -/ followed by electron transfer from Ru(II) to Co(III). The nonlinear least squares fit of the kinetic results shows that Q/sub ip/=10.6.plmin.0.7/M and k/sub et/=93.9.plmin.0.7/s at pH=8.0, .mu.=0.10M and T=25.degree.C.
- 英文摘要: --
- 中文關鍵字: Outer Sphere Electron Transfer; Ion Pair; Pseudo First Order Reaction; Kinetic Reaction; Rate Constant
- 英文關鍵字: 外層電子轉移;離子對;假一級反應;動力學反應;速率常數