SYNTHESIS AND STRUCTURE OF THE MAGNESIUM 1 HYDROXYETHYLIDENEDIPHOSPHONATEGERMANATE(IV), ITS INFLUENCE ON THE GROWTH AND DEVELOPMENT OF WINTER WHEAT

Abstract

A different-ligand complex of Germanium (IV) and Magnesium with 1-hydroxyethylidenediphosphonic acid (H4hedp) [Mg(H2O)6]3[Ge6(m-OH)6(m-hedp)6]∙20Н2О (I) was synthesized. Its composition and structure was established with the methods of elemental__is crystallohydrate, this is confirmed with the band n(Н2О) in the IR-spectrum at 3433 cm-1 and clear band d(Н2О)=1661 сm-1 of the coordinated water molecules. In the IR-spectra of I there are presented stretching vibration band of the bond Ge-O (589 сm-1) and deformation vibration band of Ge-О-Н (821 см-1), which means that Ge is in the hydrolyzed form. Hydroxyl group is a bridging ligand, this is confirmed with presence of the deformation vibration bands at 1010 сm-1. There also appear absorption bands at 1197, 1058 and 980 сm-1, which are typical for nas(PO3) and ns(PO3). This shows that only completely deprotonated phosphoric groups PO32- are presented in the compound I. On the thermogram I two low-temperature effects are presented at 70-110 °С and 110-170 °С. According to the temperature of elimination, 20 water molecules in the calculation for one formula unit are crystallization and 18 – are coordination. It was established, that application of this compound for the secondary tillage of the seeds of winter wheat promotes the increasing of its effective germination (75%), intensive increasing of the overland mass of the plant (17 cm) and primary root system (7.5 cm). These rates are much higher comparatively to the control and etalon – complex fertilizer Novalon. The application of new compound increases chances to obtain friendly and well-developed seedlings of wheat, that are able to ensure the frost resistance and receiving of high harvest. The obtained results indicate the perspective of future studies of the synthesized compound on the different plants with the aim of its implementation it in the planting practice as an effective simulator of growth.

Keywords

• германій
• 1-гідроксіетилідендифосфонова кислота
• координаційні сполуки
• пшениця озима
• регулятори росту рослин