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首页> 外文期刊>Journal of Physical Organic Chemistry >EQUILIBRIUM OF α-AMINOACETONITRILE FORMATION FROM FORMALDEHYDE, HYDROGEN CYANIDE AND AMMONIA IN AQUEOUS SOLUTION: INDUSTRIAL AND PREBIOTIC SIGNIFICANCE
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EQUILIBRIUM OF α-AMINOACETONITRILE FORMATION FROM FORMALDEHYDE, HYDROGEN CYANIDE AND AMMONIA IN AQUEOUS SOLUTION: INDUSTRIAL AND PREBIOTIC SIGNIFICANCE

机译：甲酸，氰化氢和氨在水溶液中形成的α-酰胺基乙醛平衡：工业和生前意义

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摘要

The equilibrium constant, K_(an(H_2CO)), for the formation of α-aminoacetonitrile from formaldehyde, ammonia and hydrogen cyanide was evaluated at 25℃. A first estimation of K_(an(H_2CO)) was obtained from extrathermodynamic relationships of the type log K′ vs Σσ~*. The final value was then obtained from a comparison of the experimental and calculated pH dependences of α-hydroxy- and α-aminoacetonitrile concentrations. From these results, it appears that, after equilibrium, the ratio between the concentrations of the two precursors glycine and hydroxyethanoic acid, is a linear function of the concentration of free ammonia, i.e. [CH_2(OH)CN] [CH_2(NH_2)CN] = 21[NH_3] at 25℃.
机译：在25℃下评估了由甲醛，氨水和氰化氢形成α-氨基乙腈的平衡常数K_（an（H_2CO））。从类型log K'与Σσ〜*的热外关系获得了K_（an（H_2CO））的第一估计。然后，通过比较实验和计算得出的α-羟基乙腈和α-氨基乙腈浓度对pH的依赖性来获得最终值。从这些结果可以看出，平衡后，两种前体甘氨酸和羟基乙酸的浓度之比是游离氨即[CH_2（OH）CN] [CH_2（NH_2）CN]浓度的线性函数。 ] ＝ 21 [NH_3]在25℃。

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