Chemical Problems最新文献_第2页

SYNTHESIS AND STRUCTURE OF PLATINUM (II) COMPLEXES WITH DECOMPOSITION PRODUCT OF DITHIODIETHYLAMINE βMERCAPTOETHYLAMINE 二硫代二乙胺-巯基乙胺分解产物铂配合物的合成与结构

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-1-21-28

G. Ajalova, Kh.I. Hasanov, A. N. Azizova, Sh.Q. Qasımov, K. K. Badalova

{"title":"SYNTHESIS AND STRUCTURE OF PLATINUM (II) COMPLEXES WITH DECOMPOSITION PRODUCT OF DITHIODIETHYLAMINE βMERCAPTOETHYLAMINE","authors":"G. Ajalova, Kh.I. Hasanov, A. N. Azizova, Sh.Q. Qasımov, K. K. Badalova","doi":"10.32737/2221-8688-2023-1-21-28","DOIUrl":"https://doi.org/10.32737/2221-8688-2023-1-21-28","url":null,"abstract":"The interaction of dithiodiethylamine (cystamine) (L1 ) with Pt(II) in aqueous medium was studied and it showed that in aqueous solutions in an acidic medium, the disulfide bond L1 was cleaved, followed by coordination of platinum to form β-mercaptoethylamine (mercamine, LH). Depending upon the reaction conditions, binuclear complexes of composition µ(S)[Рt2(LН)2С14](I), µ(Cl)[Рt2(LН)2С14](II) with bridging chlorine or sulfur atoms were formed. At 70°С, a compound with a bridged position of sulfur atoms (complex I), and at lower temperatures (30-500 ) with a bridged position of chlorine atoms (complex II) were formed. X-ray structural analysis of the complex [Рt2(LН)2С14] (I) was carried out. Crystals I are rhombic, with 20°Са = 17.282(1), b = 9.986(1), с = 8.0188(9) Å;R = 0.029. Molecule I is a binuclear complex in which platinum atoms are linked by a pair of bridging thiolate ligands (-SСН2-СН2-МН3 + ). The Pt2S2 metallocycleis are bent along the sulfur-sulfur line, so that the dihedral angle between the coordination planes of platinum atoms is equal to 138°. The S–S distance, equal to 2.909(1) Å, is noticeably shorter than the doubled van der Waals radius of the sulfur atom (3.60 Å). The structure of the complexes was also confirmed by IR spectroscopy data.","PeriodicalId":10015,"journal":{"name":"Chemical Problems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87431373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THEORETICAL ASPECTS OF VIBRATIONAL SPECTROSCOPY OF CONDENSED SYSTEMS WITH IMPURITY PARTICLES 含杂质粒子凝聚体系振动光谱的理论研究

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-3-211-220

T. Marsagishvili, M. Machavariani

引用次数: 0

COMPARATIVE ANALYSIS OF NEW MONOMER AND GEMINI SURFACTANTS SYNTHESIZED ON THE BASIS OF DODECANOIC ACID AND ETHANE-1,2- DIAMINE DEPENDING ON THEIR MOLAR RATIO 十二烷酸与乙烷-1,2-二胺按摩尔比合成的新型单体表面活性剂与Gemini表面活性剂的比较分析

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-2-178-187

I. Zarbaliyeva, H. Nabiyeva, Amina Alimova, S. Zargarova

引用次数: 0

EQUILIBRIUM CONDITIONS, ADSORPTION KINETICS OF THE GeO2-Cu(II)-NaCl SYSTEM ON DIAION CRBO2 ANIONITE AND DESORPTION MODE FROM SPENT COLUMNS GeO2-Cu(II)-NaCl体系在阳离子CRBO2阴离子上的平衡条件、吸附动力学及废柱解吸模式

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-1-64-71

M. Jafarli, A. Abbasov

引用次数: 0

SYNTHESIS OF AMINOMETHYL DERIVATIVES OF 3-MERCAPTO-2- HYDROXYPROPYL-1-ISOBUTYL ETHER AND THEIR STUDY AS PROTECTIVE ADDITIVES TO LUBRICANT OILS 3-巯基-2-羟丙基-1-异丁基醚胺甲基衍生物的合成及其作为润滑油保护添加剂的研究

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-1-48-56

V. Farzaliyev, Sh.R. Aliyev, R. Babai, R. Mammadova, G. Guliyeva, A. Mammadov, G.Sh. Eivazova

{"title":"SYNTHESIS OF AMINOMETHYL DERIVATIVES OF 3-MERCAPTO-2- HYDROXYPROPYL-1-ISOBUTYL ETHER AND THEIR STUDY AS PROTECTIVE ADDITIVES TO LUBRICANT OILS","authors":"V. Farzaliyev, Sh.R. Aliyev, R. Babai, R. Mammadova, G. Guliyeva, A. Mammadov, G.Sh. Eivazova","doi":"10.32737/2221-8688-2023-1-48-56","DOIUrl":"https://doi.org/10.32737/2221-8688-2023-1-48-56","url":null,"abstract":"The electrochemical corrosion prevention of engines and mechanisms is a task of great national, economic and defense importance. Lubricating oils commonly used in engineering do not have sufficient protective properties and are unable to effectively protect it from corrosion, both during operation and during short-term and long-term inactivity. One of the simplest and most rational ways to solve this problem is the use of lubricants containing effective protective (conservation) additives, which, without worsening the normal working properties of oils provide them conservation properties. By the action of 3-mercapto-2- hydroxypropyl-1-isobutyl ether, taken as a synthon, with secondary aliphatic and heterocyclic amines under the conditions of the Mannich reaction, a number of aminomethyl derivatives were synthesized. Aminomethyl derivatives of 3-mercapto-2-hydroxypropyl-1-isobutyl ether are dissolved well in oils and are stable during storage. The protective properties of the synthesized compounds were studied in M-12 oil. The best test results were obtained with 3-piperidinomethilthio-2-hydroxypropyl-1-isobutyl ether - at a concentration of 1% to the lubricating oil M-12, the corrosion of a steel plate in a humid chamber is 3%, in sea water after 24 hours – 5%, the corrosion of a steel plate under the action of a 0.1% acid solution HBr – 3,5%. These results are higher than those of the standard - industrial additive urea succinimide. (SIM).","PeriodicalId":10015,"journal":{"name":"Chemical Problems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76029621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SYNTHESIS AND CHARACTERISTICS OF SULFATED CHITOSAN BASED ON CHITIN/CHITOSAN FROM ARTEMIA PARTHENOGENETICA CYSTS 单性蒿壳聚糖/壳聚糖硫酸盐酸化壳聚糖的合成及性能研究

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-3-242-250

B.P. Karlybaeva, G. Berdimbetova, A. Boymirzaev

引用次数: 0

PHASE EQUILIBRA IN THE Ag2Se–Ag8GeSe6–Ag8SiSe6 SYSTEM AND CHARACTERIZATION Of the Ag8Si1-xGexSe6 SOLID SOLUTIONS Ag2Se-Ag8GeSe6-Ag8SiSe6体系的相平衡及Ag8Si1-xGexSe6固溶体的表征

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-3-229-241

G. Ashirov, K. N. Babanly, L. Mashadiyeva, Y. Yusibov, M. Babanly

{"title":"PHASE EQUILIBRA IN THE Ag2Se–Ag8GeSe6–Ag8SiSe6 SYSTEM AND CHARACTERIZATION Of the Ag8Si1-xGexSe6 SOLID SOLUTIONS","authors":"G. Ashirov, K. N. Babanly, L. Mashadiyeva, Y. Yusibov, M. Babanly","doi":"10.32737/2221-8688-2023-3-229-241","DOIUrl":"https://doi.org/10.32737/2221-8688-2023-3-229-241","url":null,"abstract":"Phase equilibria in the Ag2Se–Ag8SiSe6–Ag8GeSe6 system were studied by differential thermal analysis and X-ray diffraction thechnique. Based on the experimental results and literature data, the projection of the liquidus surface of the Ag2Se–Ag8SiSe6–Ag8GeSe6 system, the isothermal section at 300 K and some polythermal sections of the phase diagram were constructed. It was determined that continuous series of solid solution are formed based on high-temperature cubic modification and limited solid solution areas are formed based on low-temperature modification of initial compounds on the Ag8SiSe6–Ag8GeSe6 side of concentration triangle. The formation of solid solutions leads to a sharp decreasing of polymorphic transition temperatures of ternary compounds and stabilization of high-temperature phases at room temperature. The liquidus surface of the Ag2Se–Ag8SiSe6–Ag8GeSe6 system consists of 2 areas reflecting the initial crystallization of α'-phase based on HT-Ag2Se and HT-Ag8Si1-xGexSe6 solid solutions. The obtained new phases are of interest as environmentally safe materials with thermoelectric properties and mixed ion-electron conductivity.","PeriodicalId":10015,"journal":{"name":"Chemical Problems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86940413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STUDY OF REACTION OF NICKEL (II) WITH 2.4-TYAZOLIDINDYON COMPLEX AND ITS DERIVATIVES 镍(ii)与2.4-噻唑烷酮配合物及其衍生物的反应研究

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-2-168-177

A. Zalov, K. A. Kuliyev, K. Aliyeva

{"title":"STUDY OF REACTION OF NICKEL (II) WITH 2.4-TYAZOLIDINDYON COMPLEX AND ITS DERIVATIVES","authors":"A. Zalov, K. A. Kuliyev, K. Aliyeva","doi":"10.32737/2221-8688-2023-2-168-177","DOIUrl":"https://doi.org/10.32737/2221-8688-2023-2-168-177","url":null,"abstract":"Spectrophotometric methods are used to study the reaction of the nickel complex with 2.4- tyazolidindico (L) and its derivatives {5- (gasilysiliden) -2,4-tyazolidindio (L1), 5- (2-chlorbenzyliden) -2,4- tyazolidindion (L2), 5-(2-hydroxybenzylide) -2,4-tiazoleader (L3), 5- (4-hydroxybenzylide)-2,4- tyazolidindion(L4),5-(2-Brom-5-methoxybenzyiliden)-2,4-tiazolyidinedion (L5). With a single extraction, the chloroform is extracted by 97.8-98.4 % of the nickel. The study of the dependence of complexation on pH showed that the optimal range of acidity, at which the optical density is maximum and constant, is at pH 2.3- 8.0. The optimal condition for the formation and extraction of the nickel complex of these compounds is (2.0- 2.5) × 10-4 M concentration L. Nickel complexes with L are stable in water and organic solvents and do not decompose for three days, and after extraction for more than a month. The maximum optical density is achieved within 5 minutes. The maximum analytical signal during the complex of nickel L is observed at 470-482 nm/ molar absorption coefficients (1.37-1.61)×104 . The comprehensive form of nickel is Ni2+while the number of protons supplanted by it from one molecule L turned out to be equal to 1. Nickel and its complexes in the organic phase are not polymerized and are in a monomeric form (γ = 1.01-1.07). The proposed method under already established optimal conditions is used to determine Ni (II) in wastewater, bottom deposits, as well as in oil and oil products.","PeriodicalId":10015,"journal":{"name":"Chemical Problems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81966031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HYROGEN BOND IN CRYSTAL STRUCTURE OF SALTS OF SYMMETRIC POLYMETHYLFERRICINIUM CATİONS (SYM.[(CH3)mC5H5–m]2Fe+X – , m=3,4,5 or МеnFc+X – , n = 6, 8, 10; X– = PF6 – , BF4 – , Br3 – )

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-3-203-210

N. Ibrahimova, S.M. Rustemova, G. М. Jafarov, I. U. Lyatifov

{"title":"HYROGEN BOND IN CRYSTAL STRUCTURE OF SALTS OF SYMMETRIC POLYMETHYLFERRICINIUM CATİONS (SYM.[(CH3)mC5H5–m]2Fe+X – , m=3,4,5 or МеnFc+X – , n = 6, 8, 10; X– = PF6 – , BF4 – , Br3 – )","authors":"N. Ibrahimova, S.M. Rustemova, G. М. Jafarov, I. U. Lyatifov","doi":"10.32737/2221-8688-2023-3-203-210","DOIUrl":"https://doi.org/10.32737/2221-8688-2023-3-203-210","url":null,"abstract":"The article explains reasons of elongation (0.019 Å) of the bond between iron–cyclopentadienyl ring in the 1,2,4,1,2,4-hexamethylferricinium (sym. Ме6Fc+ ) cation formed due to the one-electron oxidation of iron atom of sym.1,2,4,1,2,4-hexamethylferrocene (sym. Ме6Fc) molecule which is 2-2.5 times smaller (0.04–0.05 Å) than that observed in pairs of ferrocene/ferricinium (Fc/Fc+ ), sym. octamethylferrocene/sym.octamethylferricinium (Ме8Fc/Me8Fc+ ) and decamethylferrocene/decamethylferricinium (Ме10Fc/Ме10Fc+ ). For this purpose, X-ray structural parameters characterizing the interaction between cation and anion in the sym.Ме6Fc+PF6 – complex was compared with appropriate parameters in Ме8Fc+BF4 – , Ме10Fc+Br3 and Ме10Fc+PF6 – complexes; and it was mooted that there is an F …H type hydrogen bond in this complex taking into account the length of the non-valent F…H contact (bond) in the sym. Ме6Fc+PF6 – complex. The lengths of Р–F bonds and F–P–F angles of the PF6 – anion in the listed 4 sandwich complexes were compared with appropriate parameters in the РF6 – anion of the LiРF6 crystal. It has been unequivocally proved that F…H hydrogen bonds exist in the sym.Ме6Fc+PF6 – complex.","PeriodicalId":10015,"journal":{"name":"Chemical Problems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78380786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RESEARCH INTO THE EFFECT OF ETCHING PROCESS OF POROUS TITANIUM CURRENT COLLECTORS IN HYDROCHLORIC ACID ON THE PERFORMANCE OF WATER ELECTROLYZERS WITH A PROTON EXCHANGE MEMBRANE 研究了多孔钛集流器在盐酸中蚀刻工艺对质子交换膜水电解槽性能的影响

Chemical Problems Pub Date : 2023-01-01 DOI: 10.32737/2221-8688-2023-1-7-20

G.R. Kiselev, V. Fateev, I. Baranov

{"title":"RESEARCH INTO THE EFFECT OF ETCHING PROCESS OF POROUS TITANIUM CURRENT COLLECTORS IN HYDROCHLORIC ACID ON THE PERFORMANCE OF WATER ELECTROLYZERS WITH A PROTON EXCHANGE MEMBRANE","authors":"G.R. Kiselev, V. Fateev, I. Baranov","doi":"10.32737/2221-8688-2023-1-7-20","DOIUrl":"https://doi.org/10.32737/2221-8688-2023-1-7-20","url":null,"abstract":"Based on the modern methods of SEM, voltammetry, and gravimetric analysis, samples of current collectors used in electrolyzers with a solid polymer electrolyte, made of porous titanium with various degrees of etching in concentrated hydrochloric acid, were studied. A gravimetric study of the etching process of samples of various sizes from porous titanium showed that throughout the process there is a loss of mass of the sample, with the exception of two short intervals, presumably due to the formation of hydrides (60-80 sec) and oxides (4-5 min), and the samples of smaller volumes were more sensitive to weight loss and weight growth. The use of the SEM method made it possible to reveal that etching over different time intervals changes the structure of porous titanium, reducing the average particle size and increasing their porosity .In this case, the surface inhomogeneity increases due to the formation of cavities in titanium and deterioration of the contact of the current collector surface with the catalytic layer. The consequence of this is the difference in the current-voltage characteristics of electrolysis cells with different duration of etching of the current collectors: there is a decrease in the productivity of electrolysis with an increase in the duration of etching of the current collectors by ~8% for etching more than 1 minute and ~18% for etching more than 4 minutes as compared to the simultaneous immersion of the sample in acid to clean the surface.","PeriodicalId":10015,"journal":{"name":"Chemical Problems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76771431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0