Complex compounds of metal halides with alcohols

1954 ◽  
Vol 3 (3) ◽  
pp. 397-403 ◽  
Author(s):  
A. B. Kuchkarev ◽  
N. I. Shuikin
Keyword(s):  
Complex Compounds ◽  
Metal Halides

The Protective Action of Some Antioxidants II. The Metal Halide Compounds of Some Protective Agents against Aging, with Special Reference to Aldol-Alpha-Naphthylamine

1931 ◽  
Vol 4 (2) ◽  
pp. 239-247
Author(s):  
F. Kirchhof
Keyword(s):  
Heavy Metal ◽  
Ferric Chloride ◽  
Complex Compounds ◽  
Cupric Chloride ◽  
Metal Halide ◽  
Hydrocyanic Acid ◽  
Stable Complex ◽  
Metal Halides ◽  
Protective Agents ◽  
Complex Metal

Abstract The results described in the present paper can be summarized as follows: 1. Certain antioxidants containing nitrogen, like aldol-α-naphthylamine and Stabilite Alba, give in alcoholic solution with higher halides of certain metals, especially those of iron and copper, unstable intense blue-violet as well as stable carmine-red colorations, which may be regarded as more or less stable complex compounds of these antioxidants. A series of other heavy metal halides of which similar behavior would be expected (for example, SnCl4, CoCl3, etc.) give no color reactions of this kind. 2. Both the chemical and the optical behavior of these colored solutions indicate that they contain complexes of ferric chloride and cupric chloride groups attached to tertiary nitrogen, as in the haemin of blood pigment. 3. Of the antioxidants studied here, aldol-α-naphthylamine reacts quickest with the metal halides named above, Agerite the slowest and Stabilite Alba somewhere between the two. The reaction with cupric chloride occurs in every case much more rapidly than that with ferric chloride. It is obvious that this behavior might be utilized to distinguish analytically small quantities of these substances. 4. The complex metal halide compounds show strong oxygen-transporting action, as does the haemin of the blood, which contains iron. This is many times greater with the compounds of antioxidants which contain copper than with those which contain iron compounds, and this agrees with the similar behavior of compounds of these metals with rubber, as has long been known. 5. Since the antioxidants are oxidized in the course of time, as the result of autoöxidation, they protect an autoöxidizable substance like rubber only so long as they are not rendered inactive. Since traces of soluble heavy metal compounds, especially of iron, are invariably present in rubber compounding ingredients, it can be understood why rubber mixtures containing protective agents are more or less strongly and more or less rapidly discolored as a result of the formation of dark-colored metal complex compounds and their oxidation products. 6. Finally it was possible to show that the complex metal halide compounds of the antioxidants studied are remarkably sensitive toward certain catalytic poisons such as hydrocyanic acid, in quite an analogous fashion to known biological oxygen carriers. It is entirely possible that this phenomenon may also be of significance in the use of protective agents in technical rubber mixtures.

ESR Study on Polyvinylidene Fluoride Doped with Transition Metal Halides

2012 ◽  
Vol 428 ◽  
pp. 94-99
Author(s):  
Somia M. El Hefnawy
Keyword(s):  
Free Radicals ◽  
Transition Metal ◽  
Dielectric Response ◽  
Hyperfine Splitting ◽  
Polyvinylidene Fluoride ◽  
Complex Compounds ◽  
Magnetic Interactions ◽  
Metal Halides ◽  
Space Charges ◽  
Spin Resonance

The main goal of this research is studying the crystal structure and formation of both free radicals and trapped space charges in the pure and doped polyvinylidene fluoride (PVDF) films with various concentrations of transition metal halides TMHs (AlCl3, ZnCl2, and CoCl2). Electron Spin Resonance (ESR) was used to detect the existence of free radicals and the probable magnetic interactions between the halide and PVDF. The hyperfine splitting of the ESR was used to study the electronic structure of the existence radicals. Thermally stimulated dielectric response measurements have been made using Frequency Resolved Dielectric Spectroscopy (FRDS). This was useful for studying the formation and trapping of the space charge to enhance the results obtained by ESR. The new crystalline structures and the complex compounds which may be developed due to the chemical reaction between the polymer and the added halides were analysid.

STUDY ON NEW COMPLEX COMPOUNDS OF Ti(IV) AND Zr(IV) IN AQUEOUS SOLUTIONS: SYNTHESIS, STABILITY AND APPLICATION IN CLEANER TECHNOLOGIES OF NATURAL LEATHER

2008 ◽  
Vol 7 (3) ◽  
pp. 241-248 ◽  
Author(s):  
Doina Sibiescu ◽  
Ioan Rosca ◽  
Daniel Sutiman ◽  
Marian Crudu ◽  
Adrian Cailean ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Complex Compounds ◽  
Cleaner Technologies

INDICATORS OF THE RAT CARDIORESPIRATORY SYSTEM UNDER THE ACTION OF ACETYLSALICYLIC ACID AND ITS COMPLEX COMPOUNDS WITH METALS

2020 ◽  
Vol 6(72) (2) ◽  
pp. 267-280
Author(s):  
E. N. Chuyan ◽  
I. S. Mironyuk ◽  
M. Yu. Ravaeva ◽  
I. V. Cheretaev ◽  
T. V. Grishina
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Acetylsalicylic Acid ◽  
Biological Effect ◽  
Complex Compounds ◽  
Cardiorespiratory System ◽  
Animal Physiology ◽  
Scientific Equipment ◽  
Pharmaceutical Activity ◽  
Reported Study

The paper researches the effect of cobalt (АСCo2+) and zinc (АСZn2+), nickel (Ni2+) and manganese (Mn2+) acetylsalicylates in doses of 5 and 10 mg/kg on the characteristics of the rats’ cardiorespiratory system. The study was carried out on the basis of the Center for collective use of scientific equipment «Experimental Physiology and Biophysics» of the Department of Human and Animal Physiology and Biophysics of the V. I. Vernadsky Crimean Federal University. The research of the biological effect of the acetylsalicylic acid, АСCo2+, АСZn2+ , АСNi2+, АСMn2+was carried out during their intraperitoneal injection into rats in doses of 5 mg/kg and 10 mg/kg. Simultaneously the following characteristics of all the groups’ animals were registered: heart rate (HR), respiratory rate (RR), systolic blood pressure (SBP) and diastolic blood pressure (DBP). The pulse pressure (PP) was calculated on the basis of the SBP and DBP indices difference. BP, HR and RR of the rats were registered with the help of the system NIBP200A («BiopacSystems, Inc.», USA). The results of the current research allowed to determine that the coordinating compounds of the acetylsalicylic acid with such metals as Co, Zn, Ni2+, Mn2+ not only have more pronounced biological effect in comparison with the acetylsalicylic acid, but demonstrate new properties; the most effect on the cardiorespiratory system was achieved by АСZn2+. Thus, the results of the current research allow us to claim that the salts of the acetylsalicylates, having the metal-complexing in its molecules’ composition, have more pronounced and qualitatively new properties in comparison with the acetylsalicylic acid precursor’s properties; this makes the further search for biological and pharmaceutical activity of these coordinating compounds more perspective, as well as it makes the technology of complexingan inexpensive and highly efficient approach to the creation of new medicines. The reported study was funded by RFBR, project number 20-33-70142

New Coordination Compounds of Fe(III) with Organic Ligands

2009 ◽  
Vol 59 (12) ◽  
Author(s):  
Mihaela Flondor ◽  
Ioan Rosca ◽  
Doina Sibiescu ◽  
Mihaela-Aurelia Vizitiu ◽  
Daniel-Mircea Sutiman ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Complex Compounds ◽  
Organic Ligands ◽  
X Ray Diffraction ◽  
X Ray ◽  
Elemental Chemical Analysis ◽  
Structural Formulae ◽  
Paramagnetic Properties

In this paper the synthesis and the study of some complex compounds of Fe(III) with ligands derived from: 2-(4-chloro-phenylsulfanyl)-1-(2-hydroxy-3,5-diiodo-phenyl)-ethanone (HL1), 1-(3,5-dibromo-2-hydroxy-phenyl)-2-phenylsulfanyl-ethanone(HL2), and 2-(4-chloro-phenylsulfanyl)-1-(3,5-dibromo-2-hydroxy-phenyl)-ethanone (HL3) is presented. The characterization of these complexes is based on method as: the elemental chemical analysis, IR and ESR spectroscopy, M�ssbauer, the thermogravimetric analysis and X-ray diffraction. Study of the IR and chemical analysis has evidenced that the precipitates form are a complexes and the combination ratio of M:L is 1:2. The central atoms of Fe(III) presented paramagnetic properties and a octaedric hybridization. Starting from this precipitation reactions, a method for the gravimetric determination of Fe(III) with this organic ligands has been possible. Based on the experimental data on literature indications, the structural formulae of the complex compounds are assigned.

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