| 薄层光谱电化学法测定辅酶B12模型化合物的生成速率常数 |
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| 引用本文： | 郑国栋,孙浩然,曹锡章.薄层光谱电化学法测定辅酶B12模型化合物的生成速率常数[J].高等学校化学学报,1992,13(4):421. |
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| 作者姓名： | 郑国栋 孙浩然 曹锡章 |
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| 作者单位： | 吉林大学化学系, 长春, 130023 |
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| 摘 要： | 用薄层光谱电化学方法和单电位-计时吸收光谱法(SPS-CA),测得钴四苯基卟啉(CoTPP)分别与碘甲烷、苄基氯和氯丁烷形成含σ钴-碳键辅酶B12模型化合物的速率常数为11.09、1.62×102和6.93×10-2mol-1·L·s-1。钴卟啉与这3种卤代烷的反应是二级反应,对各自的反应物Co(Ⅰ)TPP和卤代烷都是一级反应。
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| 关 键 词： | 辅酶B12 速率常数 光谱电化学 卟啉 |
| 收稿时间： | 1991-01-03 |
Measurement of the Formation Rate Constants of-Coenzyme B12 Models by Thin Layer Spectroelectrochemistry |
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| ZHENG Guo-dong,SUN Hao-ran,CAO Xi-zhang.Measurement of the Formation Rate Constants of-Coenzyme B12 Models by Thin Layer Spectroelectrochemistry[J].Chemical Research In Chinese Universities,1992,13(4):421. |
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| Authors: | ZHENG Guo-dong SUN Hao-ran CAO Xi-zhang |
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| Institution: | Department of Chemistry, Jilin University, Changchun, 130023 |
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| Abstract: | The formation rate constants of coenzyme B12 model compounds produced through the reaction of Co(I)TPP]- with PhCH2Cl, CH3I, CH3(CH2)3Cl was measured by thin layer spectroelectrochemistry i.e.single potential step chronoabsorptiometry(SPS-CA).Their values are 1.62 × 102 mol-1·L·s-1 for PhCH2Cl, 11.09 mol-1·L·s-1 for CH3Iand 6.93 × 10-2 mol-1·L·s-1 for CH3(CH2)3Cl respectively.These reactions are second order and first order in respect of Co(I)TPP]- or RX. |
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| Keywords: | Coenzyme B12 Rate constant Spectroelectrochemistry Porphyrin |
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