| 几种新重氮氨基试剂的合成及其分析性能 |
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| 引用本文： | 杨明华,郑云法,龚楚儒.几种新重氮氨基试剂的合成及其分析性能[J].分析试验室,2001,20(2):10-13. |
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| 作者姓名： | 杨明华 郑云法 龚楚儒 |
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| 作者单位： | 1. 浙江丽水师范专科学校化学系,
2. 湖北师范学院化学系, |
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| 摘 要： | 合成了 6种新的重氮氨基新试剂。研究了试剂亚氨基质子的离解常数p Ka及试剂与 Cd( )的显色反应。结果表明 ,随着试剂 1位苯环上的对、间位取代基的取代基常数 σ值的增大 ,试剂亚氨基的质子离解常数 Ka也增大 ( p Ka值减小 ) ,与 Cd2 +反应的显色酸度也越高 ;反应的最佳操作酸度 p H操作 与试剂p Ka存在如下关系 :p Ka=p H操作 - ( 1 .4± 0 .2 )
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| 关 键 词： | 重氮氨基试剂 合成 性能 显色反应 光度分析 |
| 文章编号： | 1000-0720(2001)02-0010-04 |
Synthesis of Several New Diazoamino Reagents and Study on Their Analytical Properties |
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| YANG Minghua,ZHENG Yun fa.Synthesis of Several New Diazoamino Reagents and Study on Their Analytical Properties[J].Chinese Journal of Analysis Laboratory,2001,20(2):10-13. |
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| Authors: | YANG Minghua ZHENG Yun fa |
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| Abstract: | Six new diazoamino reagents were synthesized. The dissociationconstants(Ka) of them were estimated, and the color reactions of these reagents with Cd2+ were studied.The results showed that the larger the substituent constant(σ) of substituting group in benzene cycle, the larger the dissociation constant of imino group(-NH-), and the stronger the optimal acidity for reaction of the reagent with Cd2+. The relationship between optimal acidity for reaction of the reagent with Cd2+and pKa was found to be pKa=pH-(1.4±0.2). |
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| Keywords: | Diazomino reagent Synthesis Property Color reaction |
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