| D-葡萄糖D-果糖与硼的有机物形成配合物的稳定性研究 |
| STUDY OF THE STABILITY OF THE COORDINATION COMPOUNDS OF D-GLUCOSE OR D-FRUCTOSE WITH BORON ORGANIC COMPOUNDS |
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| 摘要: 葡萄糖异构酶加速葡萄糖与果糖的平衡,平衡时果糖含量为42%左右,体系中加入一些硼酸盐,果糖的含量提高到80%左右,究其原因可能是由于葡萄糖和果糖与硼酸盐形成不同稳定性的配合物。虽然Roy,Conner,Daris,Belcher,Lorand等都已报导了这些配合物的稳定常数,概括结果分歧较大。Belcher曾首次报导了硼酸与D-果糖的配位数为2.9,但稳定常数至今尚未见有报导.本文用pH法较系统地测定了硼酸,苯硼酸与葡萄秘的逐级稳定常数,对所有试剂及其处理与常规方法相同,对测定方法和数据处理进行了一些改进,初步提出了硼酸体系对葡萄糖异构化反应的影响,为高果糖浆生产提供了一个途径。 |
| 关键词: 配合物的稳定性 D-葡萄糖 D-果糖 硼的有机化合物 |
| 基金项目: |
| Abstract: The coordination numbers and the stability constants of the coordination compounds formed from D-glucose or D-fructose with boric acid or benzeneboric acid have been determined respectively by using pH method under different temperatures. Meanwhile,we obtained also further standard free energy changes △G° ,standard enthalpy changes △H° and standard entropy changes AS°for the above mentioned coordination reactions. The experiment results show that the stability constants of coordination compounds of D-fructose with boric acid or benzeneboric acid are much greater than those of D-glucose with corresponding boric acids ( about 300 times,25℃ in boric acid ). This makes isomerization equilibrium move to the fructose formation direction. This paper also studied the influence of solvent upon the stability of the above mentioned coordination compounds. A catalytic mechanism for the isomerization reaction of D-fructose in boric acid or benzeneboric acid has been suggested. |
| Keywords: stability of coordination compound D-glucose D-fructose boron organic compound |
| 投稿时间：1987-12-09 |
| 摘要点击次数: 1184 |
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| 计亮年,江涛.D-葡萄糖D-果糖与硼的有机物形成配合物的稳定性研究[J].无机化学学报,1989,5(4):101-104. |
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