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Grant等人在研究由水解K~*CN制取标记甲酸盐的过程中发现,以杂质形式存在于K~*CN中的碳酸盐与甲酸盐之间进行~(14)C的交换,并提出了可能的反应历程.我们在工作中发现碳酸钠和乙酸钠、丙酸钠、硬脂酸钠之间不发生~(14)C交换反应,并验证了甲酸钠和碳酸氢钠之间的交换反应。我们还探讨了交换反应历程,活化能和反应速度常数。实验 Na_2~(14)C0_3溶液的制备图1是标记Na_2~(14)C0_3溶液的制备装置。在C0_2发生器A中加入BaC0_3,在B中加入Ba~(14)CO_3,分液漏斗C和D中置放磷酸,吸收瓶E_1,E_2,E_3,E_4中分别加入定量的
Grant et al. Studied the preparation of labeled formate from hydrolyzed K ~ * CN and found that the exchange of ~ (14) C between the carbonate and formate in the form of impurities in K ~ * CN , And proposed a possible reaction process.We found in the work of sodium carbonate and sodium acetate, sodium propionate, sodium stearate did not occur between the ~ (14) C exchange reaction, and verified the sodium formate and sodium bicarbonate The exchange reaction. We also explored the exchange reaction history, activation energy and reaction rate constants. Preparation of experimental Na_2 ~ (14) C0_3 solution Figure 1 is the preparation of labeled Na_2 ~ (14) C0_3 solution. Add BaC0_3 in C0_2 generator A, Ba ~ (14) CO_3 in B, and phosphoric acid in the separating funnels C and D. The absorption bottles E_1, E_2, E_3 and E_4 were respectively added with quantitative