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Study of the complex-forming ability of polygalacturonic acid with tin ions

Samples of a trisubstituted tin-organic compound with D - (+) - galacturonic acid have been synthesized. A study of the compound was carried out by a semiempirical quantum-chemical method, its structural feature was proved, and alsographs of changes in energy and electronic characteristics are constructed depending on the charge on atoms, the order of bonds, the energy of the boundary molecular orbitals. Computer models of the complex compound of polygalacturonic acid with tin ions were obtained, the centers of nucleophilic and electrophonic attacks, donor-acceptor groups, and the electronic structure were determined. The new synthesized compounds were characterized by 1H, 13C and 119Sn NMR - a method was shown that galacturonic acid acts as a monoanionic fragment and indicates the dynamic behavior of compounds with the participation of the anomeric carbon atom of the ligand.