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Variety Trial on Tomato Hybrids in Greenhouse Conditions of the Prearal Area of Kazakhstan

“…One of the most important factors in the intensification of greenhouse tomato production is the introduction of new high-yielding varieties and hybrids which have complex resistance to diseases and pests adapted to new technologies and unfavorable climatic conditions (Balashov, 2006;Korol, 2000;Gavrish, 2015).…”

Influence of structure of the crystal lattice of nickel(II) complex with amide-containing ligand on its stability and adsorption properties

“…It follows from the X-ray crystal analysis that the nickel(II) ion in this compound lies in a square planar environment formed from the nitrogen donor atoms of two deprotonated amides and two primary amino groups of the ligand [11]. The water molecules do not interact with the metal ion but are involved in the formation of hydrogen bonds only.…”

“…Publications which have appeared recently indicate the possibility of using these compounds for the absorption and storage of gases [6,7] including molecular hydrogen [7-9]. Despite the definite success achieved recently, the physico-chemical aspects of the adsorption of gases by substances with different chemical properties and the related structural-chemical conversions metal complex absorbents are far from being explained, in the first place because of the absence of sufficient quantitative experimental data.We have studied the properties of material based on a complex of nickel(II) with a tetradentate ligand containing two amine and two amide groups, NiL, by different methods of X-ray crystallographic analysis and weight absorption in order to study the interconnection between the structure of the crystal lattices and its stability during adsorption and desorption of molecules of different types.The free ligand H 2 L (5-benzyl-4,6-dioxo-1,9-diamino-3,7-diazanonane) was made by the reaction of diethyl benzylmalonate with ethylenediamine by a method analogous to one published previously [10]. The compound NiL·2H 2 O was obtained by the reaction of nickel(II) hydroxide with the ligand in aqueous ethanolic solution (elemental analysis, %: found -C 45.75, H 6.57, N 14.87; calculated for C 14 H 24 N 4 NiO 4 -C 45.32, H 6.52, N 15.10).…”

“…The free ligand H 2 L (5-benzyl-4,6-dioxo-1,9-diamino-3,7-diazanonane) was made by the reaction of diethyl benzylmalonate with ethylenediamine by a method analogous to one published previously [10]. The compound NiL·2H 2 O was obtained by the reaction of nickel(II) hydroxide with the ligand in aqueous ethanolic solution (elemental analysis, %: found -C 45.75, H 6.57, N 14.87; calculated for C 14 H 24 N 4 NiO 4 -C 45.32, H 6.52, N 15.10).…”

“…We analyzed the molecular structure of the complex and the structural characteristics of nickel(II) previously [11], in the context of the present work we shall discuss the characteristics of the crystal structure of this compound, the possibility of its change during dehydration/rehydration, and its interaction with some other adsorbates.…”