Complexes of Ethylenediaminetetraacetic Acid with Amines. Molecular Structures of Bis(monoethanolaminium) Ethylenediaminetetraacetate and Bis[tris(hydroxymethyl)methylaminium] Ethylenediaminetetraacetate Trihydrate.

Tetrabasic ethylenediaminetetraacetic acid H₄L binds two molecules of monobasic amines to give the corresponding salts: ethylenediaminetetraacetates of bis(monoethanolaminium) H₂L^2–⋅2⁺H₃NCH₂CH₂ОН, tris(hydroxymethyl)methylaminium H₂L^2–⋅2⁺H₃NС(CH₂ОН)₃⋅3H₂О, diethylaminium H₂L^2–⋅2⁺H₂N(C₂H₅)₂⋅H₂О, tert-butylaminium H₂L^2–⋅2⁺H₃NС(CH₃)₃⋅5H₂О, and triethanolaminium H₂L^2–⋅2⁺HN(CH₂CH₂ОH)₃. Dibasic hexamethylene-1,6-diamine, triethylenediamine, and tetramethylethylenediamine form the following 1 : 1 adducts: H₂L^2–⋅⁺NH₃(CH₂)₆NH , H₂L^2–⋅⁺NH₃CH₂CH₂(OCH₂CH₂)₂NH , H₂L^2–⋅ ⁺HN(CH₂CH₂)₃NH⁺⋅H₂О, and H₂L^2–⋅⁺H(CH₃)₂NCH₂CH₂N(CH₃)₂H⁺. The molecular structures of bis(monoethanolaminium) ethylenediaminetetraacetate and bis[tris(hydroxymethyl)methylaminium] ethylenediaminetetraacetate trihydrate were determined. [ABSTRACT FROM AUTHOR]