• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Equilibrium Constants in Reactions of 2-Aminoethanol and Ammonia with Isophthalaldehyde and Terephthalaldehyde
【24h】

Equilibrium Constants in Reactions of 2-Aminoethanol and Ammonia with Isophthalaldehyde and Terephthalaldehyde

机译：2-氨基乙醇和氨与间苯二甲醛和对苯二甲醛反应的平衡常数

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Equilibria established in reactions between isophthalaldehyde (IPA) and terephthalaldehyde (TPA) on one side and 2-aminoethanol and NH3 on the other side were followed in solutions, where these amines acted both as reagents and as buffers. The equilibrium between TPA and 2-aminoethanol was followed spectrophotometrically; all others, of reactions of TPA with NH3 and of IPA with both NH3 and H2N-CH2-CH2-OH, were followed by using polarography. Separate limiting reduction currents of the dialdehyde and its imine enable simultaneous determination of the starting material and the product. The equilibria are shifted more in favor of the imine in reactions of TPA than those of IPA. Equilibrium constants for reactions of both TPA and IPA with 2-aminoethanol are 3 orders of magnitude higher than those observed for the reactions of dialdehydes with NH3, even when the pKa values of these two reagents differ only slightly.
机译：在溶液中遵循一方面是间苯二甲醛（IPA）与对苯二甲醛（TPA）之间的反应，另一方面是2-氨基乙醇和NH3之间建立的平衡，其中这些胺既充当试剂又充当缓冲剂。用分光光度法测定TPA和2-氨基乙醇之间的平衡。 TPA与NH3和IPA与NH3和H2N-CH2-CH2-OH的所有其他反应均采用极谱法进行。二醛及其亚胺的单独的极限还原电流使得能够同时测定原料和产物。与IPA相比，TPA反应中的亚胺平衡更倾向于亚胺。 TPA和IPA与2-氨基乙醇的反应平衡常数比二醛与NH3的反应平衡常数高3个数量级，即使这两种试剂的pKa值仅略有不同。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号