| 新显色剂4－（2－苯并噻唑偶氮）焦棓酚的离解平衡研究 |
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| 引用本文： | 周华方.新显色剂4－（2－苯并噻唑偶氮）焦棓酚的离解平衡研究[J].徐州师范大学学报(自然科学版),1994(4). |
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| 作者姓名： | 周华方 |
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| 摘 要： | 新显色剂４－（２－苯并噻唑偶氮）焦酚在各种酸度介质中的吸收光谱表明，该显色剂有十一种存在型体。根据试剂的结构和各种官能团对电子的作用，拟定了六级离解平衡和三级质子化平衡以及四对互变异构平衡，并测定了六级离解平衡常数，它们的ｐＫ．分别为－７．００．－３．９８．０．２６，５．３０，８．６３和１０．３１。
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| 关 键 词： | 4－（2－苯并噻唑偶氮）焦 酚，离解平衡 |
STUDIES ON DISSOCIATION EQUILIBRIA OF 4-(2-BENZOTHIAZOLYLAZO) PYROGALLOL |
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| Zhou Huafang.STUDIES ON DISSOCIATION EQUILIBRIA OF 4-(2-BENZOTHIAZOLYLAZO) PYROGALLOL[J].Journal of Xuzhou Normal University(Natural Science Edition),1994(4). |
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| Authors: | Zhou Huafang |
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| Institution: | Zhou Huafang |
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| Abstract: | The absorption spectra show that BTAPG exists as eleven species in the solutions of different acidities. Based on structure of the reagent and effects of various functional groups on electrons,six orders of dissociation equilibria ,three orders of protonization equilibria and four pairs of tautomerization equilibria among eleven species were determined ,indicating it to be a hexaprotic acid. The negative logarithms of six orders of the dissociation constants for BTAPG, determined according to Perisic-Janjic method and methed, are-7. 00 .-3. 98 , 0. 26 , 5. 30 , 8. 63 and 10. 31 respectively. |
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| Keywords: | benzothiazolylazo)pyrogallol Dissociation equilibria |
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