Abstract

Reactions of nitrilotriacetic acid with 2-aminoethanol, 2-amino-2-(hydroxymethyl)propane-1,3-diol, and 2,2'-(ethylenedioxy)bis(ethylamine) afford the following salts in high yields: 2-ammonioethanol nitrilotriacetate [HN⁺(CH₂COO^–)₂(CH₂COOH) ⋅ H₃N⁺CH₂CH₂OH]_n, bis{2-ammonio-2-(hydroxymethyl)propane-1,3-diol} nitrilotriacetate HN⁺(CH₂COO^–)₃ ⋅ 2H₃N⁺C(CH₂ OH)₃, and 2,2'-(ethylenedioxy)bis(ethylammonium) nitrilotriacetate HN⁺(CH₂COO^–)₃ ⋅ H₃N⁺CH₂CH₂OCH₂CH₂OCH₂CH₂N⁺H₃. The molecular structures of 2-ammonioethanol nitrilotriacetate and bis{2-ammonio-2-(hydroxymethyl)propane-1,3-diol} nitrilotriacetate were determined. Nitrilotriacetic acid molecules in 2-ammonioethanol nitrilotriacetate are linked by O⋅⋅⋅H⋅⋅⋅O hydrogen bonds involving acid groups of adjacent molecules to form a polymer chain. On the contrary, nitrilotriacetic acid molecules in bis{2-ammonio-2-(hydroxymethyl)propane-1,3-diol} nitrilotriacetate do not form polymer chains. In the crystals of both compounds, adjacent molecules are linked by numerous O⋅⋅⋅H interactions to form infinite 3D frameworks.

中文翻译：

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亚硝酸三乙酸与胺的配合物。二氨基三乙酸2-氨基乙醇酯和双{2-氨基-2-（羟甲基）丙烷-1,3-二醇}三三硝基乙酸酯的分子结构

摘要

次氮基三乙酸与2-氨基乙醇，2-氨基-2-（羟甲基）丙烷-1,3-二醇和2,2'-（亚乙二氧基）双（乙胺）的反应可高收率得到以下盐：2-氨乙醇次氮基三乙酸酯[HN ⁺（CH ₂ COO ^–）₂（CH ₂ COOH）⋅H ₃ N ⁺ CH ₂ CH ₂ OH] _n，双{2-氨基-2-（羟甲基）丙烷-1,3-二醇}次氮基三乙酸酯HN ⁺（CH ₂ COO ^- ）₃ ⋅2H ₃ ñ ⁺ C（CH ₂ OH）₃和2,2' - （亚乙二氧基）双（乙基铵）次氮基三乙HN ⁺（CH ₂ COO ^- ）₃ ⋅ħ ₃ Ñ ⁺ CH ₂ CH ₂ OCH ₂ CH ₂ OCH ₂ CH ₂ Ñ ⁺ ħ ₃。确定了2-氨基乙醇次氮基三乙酸酯和双{2-氨基-2-（羟甲基）丙烷-1,3-二醇}次氮基三乙酸酯的分子结构。2-氨基乙醇次氮基三乙酸酯中的亚硝基三乙酸分子通过涉及相邻分子酸性基团的O···H···O氢键相连，形成聚合物链。相反，双{2-铵-2-（羟甲基）丙烷-1,3-二醇}次氮基三乙酸酯中的次氮基三乙酸分子不形成聚合物链。在这两种化合物的晶体中，相邻的分子通过大量的O⋅⋅⋅H相互作用连接在一起，从而形成无限的3D骨架。