| 混合溶剂中trans-[CoCl2(NH3)4]+与Fe2+反应的电子转移机理 |
| ELECTRON TRANSFER REACTIONS BETWEEN IRON(Ⅱ) AND TRANS-[CoCl2(NH3)4]+ IN MIXED SOLⅤENTS |
|
| 摘要: 用Vnion Giken Model RA-401 Stopped-flow spectrophotometer 测定了在H2O-MeOH,H2O-EtOH,H2O-PrOH,H2O-DMSO,H2O-DMF,H2O-HMPA,H2O-THF和H2O-Dioxane等混合溶剂中,trans-[CoCl2(NH3)4]+与Fe(Ⅱ)间电子转移反应的速度常数。实验结果表明,表观二级进度常数Kapp与[H+]无关;混合溶剂的性质明显的影响Kapp;在所有实验中Kapp(图4—7)先随x03增大而增大,然后,随x03继续增大而又下降;在x03较小时,InKapp随溶剂介电常数的倒数D-1增大而增大。上述事实说明反应的第三步是速控步骤。 |
| 关键词: 配位化学 氧化还原反应 |
| 基金项目: |
| Abstract: The rate constants of the electron transfer reaction between Fe(Ⅱ) and trans-[CoCl2(NH3)4]+ in mixed solvents of water and methanol (MeOH), ethanol(EtOH), 1-propanol(PrOH), dimethyl sulfoxide(DMSO), N,N-dime-thylformamide(DMF),hexainethylphosphoric trimide(HMPA), tetrahydrofuran (THF), 1,4-dioxane are determined by Union Giken Model RA-401 stopped flow spectrophotometer. The experiment results show that the apparent Kaap is independent of the acid concentration, and the nature of mixed solvents affected appreciably on Kapp. In all the measurements (Fig. 4-7) Kapp first grows larger with the increase in xos, then decreases. When the InKapp, in plotted against D-1 (the reciprocal dielectric constant), the lnKapp increases with the increase in D-1 at lower mole fraction X of organic solvents. This fact shows that the third step of reaction process is the rate control step. |
| Keywords: coordination chemistry oxidation-reduction reaction |
| 投稿时间：1985-09-11 |
| 摘要点击次数: 2840 |
| 全文下载次数: 1835 |
| 刘锡兰.混合溶剂中trans-[CoCl2(NH3)4]+与Fe2+反应的电子转移机理[J].无机化学学报,1986,2(4):31-40. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
