Coordination Compounds of Copper (Ii) Formate with Sodium and Barium Acetates

Journal of Critical Reviews

ISSN- 2394-5125 Vol 7, Issue 13, 2020

COORDINATION COMPOUNDS OF COPPER (II) FORMATE WITH SODIUM AND BARIUM ACETATES

1Abdullayeva Zubayda Shavkatovna, 2Kadirova Shakhnoza Abdujalilovna, 3Khasanov Shodlik Bekpulatovich, 4Eshchanov Erkabay Uskinovich

1Doctoral student, Khorezm Academy of Mamun, Khiva, Uzbekistan. E-mail address: [email protected] 2Professor, Faculty of Chemistry, National University of Uzbekistan named after Mirzo Ulugbek, Tashkent, Uzbekistan. Е-mail address: [email protected] 3Senior Research Associate, Khorezm Academy of Mamun, Khiva, Uzbekistan. E-mail address: mailto:[email protected] 4Associate Professor, Head of the Department of Chemistry, Urgench State University, Urgench, Uzbekistan. E-mail address: [email protected]

Received: 13.04.2020 Revised: 14.05.2020 Accepted: 10.06.2020

Abstract The article describes the synthesis of coordination compounds of copper (II) formate with sodium and barium acetates. By the method of elemental analysis, the quantitative composition of the obtained complexes was established. The study of the IR spectra of the synthesized coordination compounds shows the bridge coordination of the acetate group with the formation of polynuclear complex compounds. Keywords: coordination compound, bio nuclear complex, elemental analysis, IR spectrum.

INTRODUCTION Metal-organic coordination polymers (metal-organic MOF- chemical glass. In another glass, 0.02 mol of barium acetate was work, MOF) are a promising new class of compounds based on dissolved in 20 ml of water by heating in a hot water bath (at a non-organic building blocks consisting of one or more metal temperature of 70-80 о° C). Then a hot solution of barium cations connected by organic linkers. This class of compounds acetate was added to the copper (II) formate solution барияand attracts special attention of researchers due to the almost the mixture was heated for 1.5 hours until the volume was unlimited possibilities of the structural design of new reduced 4 times. The resulting solution was left for 2 days for compounds, and therefore a wide range of functional recrystallization. It turned out a sticky липкое substanceof a properties. New generation functional materials are being blue-green color. The resulting substance was dissolved in a developed based on MOCP, for example, for storing various mixture of 2 ml of distilled water and 2 ml of alcohol. The gases, for separating complex mixtures, as chemical current solution was left for 24 hours. At the same time, blue-green sources, sensors, and catalysts. crystals of the complex were obtained. Synthesis of a complex compound of copper (II) formate with sodium acetate was The chemistry of such coordination polymers has developed performed by the following method [2]: В0.01 mol of copper (II) intensively over the past two decades, resulting in the formate was dissolved in 15 ml of water in a chemical glass. In production of many promising porous compounds. Further another glass, 0.02 mol of sodium acetate was dissolved in 20 research in this area is carried out in the field of ml of water by heating in a hot water bath (at a temperature of functionalization of the obtained compounds by using specific 70-80о° C). building blocks that determine possible applications of materials based on the obtained MOCP. The traditional Then, a hot solution of sodium acetate was added to the solution approach to the synthesis of coordination polymers involves of copper (II) formate and the mixture was heated for 1.5 hours the use of various salts as sources of metal centers, and to reduce the volume by 4 times. The resulting solution was left polynuclear poly-core secondary building blocks in the vast for 2 days for recrystallization. A blue-green powder was majority of cases are obtained by self-Assembly in the process obtained. The resulting substance was dissolved in a mixture of of crystal growth. The use of pre-synthesized poly-nuclear 2 ml of distilled water and 2 ml of alcohol. The solution was left complexes as sources of secondary building blocks allows the for 24 hours. In this case, pale green crystals of the complex US to conduct the synthesis of MOCP more efficiently [1]. were obtained.

MATERIALS AND METHODS To determine the composition of the obtained compounds, the We used formate copper (II) acetates of sodium and barium elemental analysis was performed (Table 1). brand "h. d. a". Analysis of synthesized complex compounds on the metal content was carried out on the device Novaa 300 firm Table 1 Analytik Jena (Germany), elemental analysis for carbon, Results of elemental analysis of copper (II) formate hydrogen, nitrogen, and sulfur on the device of the "EA 1108" complexes with sodium and barium acetates company Carlo-Erba (Italy). IR absorption spectra of Cu, % Me, % C, % H, %

-1

compounds were recorded in the region of 400-4000 sm on an

IRAffin-city-1S spectrophotometer manufactured by

Shimadzu(Japan) in the form of powders and using samples in

the form of tablets with KBr diameter of 7 mm with a resolution

found found found found

-1 Compound

calculated calculated calculated of 2 sm . calculated

Method for the synthesis of bimetallic formate-acetate complexes of copper (II). Synthesis of complex compounds was carried out according to the following method: В0.01 mol of copper (II) formate was dissolved in 15 ml of water in a

Journal of critical reviews 480

COORDINATION COMPOUNDS OF COPPER (II) FORMATE WITH SODIUM AND BARIUM ACETATES

2 coordination numbers of the Central atom in synthesized .2 2 compounds are determined.

COO)

3 9,42 9,63 40,88 41,26 17,69 18,07 2,34 2,1 Based on the obtained data, the following structures are (HCOO)

u proposed for synthesized compounds: the complex of copper ( C Ba(CH II) formate with sodium acetate has an octahedral structure.

The role of the Central complexion agent is performed by the

2 copper (II) ion, which combines with oxygen atoms of the

COO carboxyl group. As it is known from the literature data, copper 3 19,67 20,12 14,38 14,46 22,24 22,64 2,48 2,51 complexes with a coordination number equal to 6 have a green

color, based on these data and based on elemental analysis, a NaCH Cu(HCOO) structure has been proposed in which copper (II) formate is connected to four sodium acetate molecules, bridging them RESULTS AND DISCUSSION with an oxygen atom (Fig.2). To determine the method of coordination of the initial components, the IR spectra of the initial salts and the obtained complex compounds were studied. The IR spectra of copper (II) formate have absorption spectra at 1560 sm-1 and 1354 sm-1, corresponding to asymmetric and symmetrical vibrations of the carboxyl group of the formate anion [3]. In the spectra of sodium and barium acetates, acetate ions appear in the region of 1539-1549 sm-1and 1406-1410 sm-1.

In the spectra of the obtained complex compounds, a band appears at 1557-1574 sm-1 of asymmetric oscillation and 1409- Figure 2. Spatial structure of the complex of copper (II) 1429 sm-1 of symmetrical oscillation of the acetate group, the formate with sodium acetate difference is 145–1485-148 sm-1, which corresponds to the bidentate-bridge coordination of the acetate group. In the In complex of copper (II) formate with barium acetate copper ( spectra of copper (II) formate, the Cu-O bond has a band at 1134 II) ions)it exhibits a coordination number equal to 6, while one sm-1, which in the case of complexes decreases to 1081-1101 copper (II) formate molecule attaches two barium acetate sm-1. The absorption band corresponding to the Me-O bond in molecules to form a complex compound of the following acetates is shown in the region of 638-648 sm-1, which is structure (Fig.3). observed in complexes at 671-675 sm-1. Based on this, it can be concluded that metal acetates coordinate bidentate-bridging with the formation of bi-nuclear and poly-nuclear formate-and acetate complexes of cobalt-metal (Fig.1).

Figure 3. Spatial structure of the complex of copper (II) formate with barium acetate

Figure 1. IR spectra of synthesized compounds REFERENCES 1. ParpievN. A., MatkarimovaN. O., Khasanov S. B. IR- Absorption bands at 3408-3473 sm-1 are also present-1in the spectroscopic study of the coordination compound 2- spectra of synthesized compounds, which indicates the mercaptothiazoline with divalent salts of cobalt, nickel, presence of crystallization water in the complex molecule [3]. and copper / / Universum: chemistry and biology. 2019. № 10 (64). Table 2. 2. Yakushev I. A. Synthesis and physical and chemical Characteristic frequencies and their relationships in IR properties of heterometallic carboxylate complexes of spectra of a ligand and complexes based on it, sm-1 palladium (II) with n - and o-bases: abstract. dis. ... Сu(HCOO)2. Cu(HCOO)2. candidate of chemical science, Moscow, 2013, 21 p. Assignment 4CH3COONa 2Ba(CH3COO)2 3. Ibragimova Mavluda R., Abdullaeva Fazilat A., Khasanov ν(H2O) 3408 3473 Shadlik B., Azizov Tokhir A. Acid amide coordination νas(COO) 1574 1568 compounds of magnesium nicotinate // Journal of νs(COO) 1408 1400 Chemical Technology & Metallurgy. 2016. Vol. 51 Issue 1. ν(Cu — O) 1081 1101 p.p. 47–52. ν(Мe — O) 675 671

CONCLUSION The synthesis of coordination compounds of copper (II) formate with sodium and barium acetates was performed. The quantitative and qualitative composition of synthesized compounds has been established. Based on the IR spectra of the obtained compounds, coordination centers, and the type of coordination of acetate groups were determined. The

Journal of critical reviews 481