CRYSTAL STRUCTURE OF THE Ni (II) AND Zn (II) HETEROMETALLIC COMPLEX WITH ETHYLENEDIAMIN-N, N'-DISUCCINIC ACID

Abstract

By the direct-synthesis of zinc oxide, nickel hydroxocarbonate with ethylenediaminedisuccinic acid was obtained a heterometallic complex of the composition C10H22N2Ni0.30O13Zn1.70. The crystal structure of this compound was characterized by X-ray diffraction analysis, absorption and IR-spectroscopy. The complex crystallizes in a triclinic system (spatial group P-1) with parameters of the elementary cell a=8,6844(3), b=10,4442(3), c=11,2520(3). The final values of the divergence factors R1=0,0581, wR2=0,0828, GOF 0,964 at reflections with I> 2σ (I). The final electronic difference from the Fourier series of the last-minute refinement cycle is 0.348 and -0.485 e/Å3. The heterometallic complex has a polymer structure, formed by structural units (NiEDDS)- and ZnOEDDS(H2O), which are bidentarily bound via atoms of the oxygen of the β-carboxyl group performing the bridge function and the oxygen atoms of the other three carboxyl groups of the ligand with their monodendental coordinates up to zinc atoms. In the ZnNiEDDS complex, the Ni2+ ion is coordinated with 5 donor atoms of the deprotonated anion EDDS4-, forming a distorted octahedral NiN2O4 environment. At the same time, three 5-membered (two glycine (Gly) and one ethylenediamine (En)) and one 6-membered β-alanine (Al) non-flat metallocycles are formed. Gly is simultaneously three 5-membered and one 6-membered non-flat metallocycles. -cycle, one-cycle Two 5-membered (En NiN2C6C5N1, Gly NiO5C8C7N2) 6-membered Al NiN1C4C3C2O3 cycles are located in the equatorial plane of the octahedron. The glitinous cycle of NiN1C4C1O2 is located in the axial plane of the coordination polyhedron and bound by C4N1 bonds with two cycles, En and Al. The molecule of water is in the axial plane, completing the structure of the polyhedron to the octahedral. In the axial position of the octahedron is a nitrogen atom N1, which, due to the stiffness of the ethylene diamine bridge structure, forms an angle N1-Ni-N2 with inequalities of Ni-N2 (2.151(3) Å) and Ni-N1 (2.108(3) Å), which leads to the formation of tetragonal distortion of the octahedron.
 The Zn2+ ion is bound to oxygen atoms of β-carboxylic groups of three different EDDS molecules, two of which are coordinated monodentally, and one is bidentanic, and with one molecule of water. In this case, one 4-membered cycle of ZnO7iC9iO8i is formed due to the β-carboxyl group of one of the EDDS molecules. The five-coordinated zinc ion forms a trigonal-bipimaramal distorted square pyramid, at the top of which is the atom of oxygen of the water molecule. In the complex there are molecules of crystallization water, which take part in the formation of the hydrogen bonds system. The distance of hydrogen bonds is in the range of 1.85 (4) - 3.378 (5) Å.

The Role of Chelate Coordination Compounds of Biogenic Metals in the Vital Activity of Plants

“…Upon en tering to a living organism, the organic part of ethylene diamine disuccinates under the influ ence of sunlight or UV radiation breaks down into essential amino acids (arginine, leucine, isoleucine, valine, histidine, asparagine, ala nine), which are present in the living organism as components of the metabolic chain (Fig. 9, table 4) [59][60][61]. Currently, the vast majority of chelated microfertilizer preparations are based on complexes of two complexones ethylenediaminetetraacetic acid and hydroxyethylenediphosphonic acid.…”

“…In complexes based on EDDS, the chelant not only element, but also has a biological activity itself. Upon entering to a living org part of ethylene diamine disuccinates under the influence of sunlight or UV down into essential amino acids (arginine, leucine, isoleucine, valine, hist alanine), which are present in the living organism as components of the metab table 4) [59][60][61].…”

SYNTHESIS AND STUDY OF NANO-SIZED COMPLEX OF Fe(III) WITH ETHYLENEDIAMINEDISUCCINIC ACID

“…In a living organism, it performs not only the function of delivering trace elements but also carries a biologically active load. Under the action of enzymes in the living organism, EDDS breaks down into essential amino acids (arginine, leucine, isoleucine, valine, histidine, asparagine, alanine), which are components of the metabolic chain [4,5]. EDDS forms fairly stable complexes with biogenic metals in a wide pH range (3-10), which in terms of biochemical structure and chemical purity are very similar to organometallic compounds that are synthesized in plant or animal cells.…”

LUMINESCENT PROPERTIES OF Nd(III) COMPLEXES WITH ETHY­LENE­DIAMINE-N,N'-DISUCCINIC AND N,N-BIS(PHOSPHONO­METHYL)-2-AMINOPROPIONIC ACIDS

“…In addition, for selective binding to various metal ions, ligands must have a heterodentate nature and an unsaturated character [1,2]. These requirements are met by polydentate acyclic ligands, such as aminopolycarboxylic (APС) or aminocarboxyphosphonic (AСPh) acids, which form highly stable metal complexes with lanthanide ions [3][4][5][6][7][8]. Complexes of lanthanides with APC or ACPh that exhibit luminescence in the IR region (Nd, Pr, Er, Yb) can be used as precursors for luminescent diagnostics, for fluorescent immunoassays, for creating amplifiers in laser systems, etc.…”

“…There are almost no studies of the luminescent properties of Ln(III) complexes with ethylene diaminedi-succinic acid (H 4 EDDS), although it is known that heterometallic neody mium complexes can be used as drugs for cancer di seases, immunodeficiency, and blood diseases [24,25]. In [5], new heterometallic complexes of neodymium and zinc with ethylenediaminedisuccinic acid were synthesized for the first time. It was shown that the monometallic complex of zinc, which is less stable than the corresponding neodymium complex, acts as a "building block" for obtaining a heterobinuclear compound by the exocoordination of additional metal ions.…”