1. Synthesis of water-soluble zinc(ii) nitrilotris(methylenephosphonate). Molecular structure of bis(4-carboxyphenylaminium) nitrilotris(methylenephosphonate) dihydrate.
- Author
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Semenov, V. V., Zolotareva, N. V., Petrov, B. I., Lazarev, N. M., Novikova, O. V., Baranov, E. V., Razov, E. N., Kodochilova, N. A., and Ivanenkova, A. O.
- Subjects
MOLECULAR structure ,COORDINATION compounds ,AGRICULTURAL exhibitions ,ZINC ,CROPS - Abstract
Nitrilotris(methylenephosphonic)acid N[CH
2 P(O)(OH)2 ]3 (H6 L) reacts with zinc oxide in an aqueous medium to give a poorly soluble polymeric crystalline salt (ZnH4 L)n . The reaction proceeds through the intermediate formation of a soluble monomer complex ZnH4 L. The water-soluble amorphous forms of the coordination compound used as microfertilizers were obtained by treatment of a suspension of this salt with 2-aminoethanol, 2-amino-2-(hydroxymethyl)propane-1,3-diol, 2,2′-(ethylenedioxy)bis(ethylamine). p-Aminobenzoic acid H2 NC6 H4 COOH reacts in an aqueous solution with hexabasic nitrilotrimethylenephosphonic acid, as well as with the monomeric complex ZnH4 L, giving crystals of bis(4-carboxyphenylaminium) nitrilotris(methylenephosphonate) dihydrate H4 L2− · 2(H3 N-C6 H4 -COOH)+ · 2H2 O. The compounds were investigated by elemental analysis, IR and UV spectroscopy, X-ray phase analysis and X-ray diffraction analysis. Tests of the water-soluble complex with 2-aminoethanol ZnHL3− · 3(H3 NCH2 CH2 OH)+ · 2H2 O in the laboratory experiment with seeds of two agricultural crops showed a positive agronomic effect. [ABSTRACT FROM AUTHOR]- Published
- 2020
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