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Crystal and molecular structure of the “asymmetric” ethylenediamine-N,N-di-3-propionic acid monohydrate

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Abstract

A new complexing agent the “asymmetric” ethylenediamine-N,N-di-3-propionic acid (as.EDDP) is obtained. The crystal structure of the new compound is determined by single-crystal X-ray diffraction. C8H16N2O4·H2O crystals are monoclinic; space group P21/c, a = 12.7416(4) Å, b = 6.5470(2) Å, c = 12.1908(4) Å, β = 93.100(1)°, Z = 4, ρ x = 1.454 mg/m3, and R 1 (I > 2.0σ(I)) = 0.0326. In the solid form, the as.EDDP molecule has a double betaine structure:

The intramolecular hydrogen bonds with the betaine proton of the tertiary nitrogen atom are formed with the participation of one oxygen atom of the carboxyl group of each 3-propionic fragment, which forms two N(1)-H(1N)-bonded six-membered H-cycles. The intermolecular hydrogen bonds are formed between the three hydrogen atoms of the protonated primary nitrogen atom and the oxygen atoms of the 3-propionic fragments of three other as.EDDP molecules. The water molecule participates in the formation of intermolecular hydrogen bonds with the oxygen atom of one carboxyl group of the molecule.

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Correspondence to O. N. Podmareva.

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Original Russian Text © 2013 O. N. Podmareva, Z. A. Starikova, N. V. Tsirul’nikova

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Translated from Zhurnal Strukturnoi Khimii, Vol. 54, No. 6, pp. 1071–1076, November–December, 2013.

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Podmareva, O.N., Starikova, Z.A. & Tsirul’nikova, N.V. Crystal and molecular structure of the “asymmetric” ethylenediamine-N,N-di-3-propionic acid monohydrate. J Struct Chem 54, 1101–1106 (2013). https://doi.org/10.1134/S0022476613060140

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  • DOI: https://doi.org/10.1134/S0022476613060140

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