L. M. Shkol'nikova, S. Sotman, A. L. Poznyak
1992
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Journal
Soviet physics. Crystallography
Abstract
The x-ray structure of ethylenediamine-N, N-diacetic acid H 2 edda is solved (λ Mo-radiation, 669 reflections, R = 0.047, R w = 0.051). The crystals are monoclinic, a = 5.231(1), b = 15.19(1), c = 5.3966(9) A, (β = 117.07(2)°, Z = 2, d calc = 1.550(2) g/cm 3 , space group P2 1 /n. The molecule has an twisted centrosymmetric structure. The weakening of intramolecular H-bonds that close H-rings that was previously observed for complexants with an NH 2 + group is confirmed