Internal asymmetry in complex compounds V. Tetrahedral complexes

1964 ◽  
Vol 5 (1) ◽  
pp. 105-111
Author(s):  
I. B. Bersuker ◽  
Yu. G. Titova
Keyword(s):  
Complex Compounds ◽  
Internal Asymmetry ◽  
Tetrahedral Complexes

Internal asymmetry in complex compounds

1962 ◽  
Vol 3 (5) ◽  
pp. 541-545
Author(s):  
I. B. Bersuker
Keyword(s):  
Complex Compounds ◽  
Internal Asymmetry

Internal asymmetry in complex compounds

1961 ◽  
Vol 2 (6) ◽  
pp. 676-681
Author(s):  
I. B. Bersuker
Keyword(s):  
Complex Compounds ◽  
Internal Asymmetry

Internal asymmetry in complex compounds

1961 ◽  
Vol 2 (3) ◽  
pp. 328-336
Author(s):  
I. B. Bersukcs
Keyword(s):  
Complex Compounds ◽  
Internal Asymmetry

Errata- Complex Compounds of Biguanides and Guanylureas with Metallic Elements

1962 ◽  
Vol 62 (6) ◽  
pp. 347-347
Keyword(s):  
Complex Compounds ◽  
Metallic Elements

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.

An Evaluation of the Antioxidant and Anticancer Properties of Complex Compounds of Copper (II), Platinum (II), Palladium (II) and Ruthenium (III) for Use in Cancer Therapy

2018 ◽  
Vol 18 (16) ◽  
pp. 1373-1381 ◽  
Author(s):  
Malinowska Katarzyna ◽  
Szczepanska Anna ◽  
Hanna Zielinska-Blizniewska ◽  
Majsterek Ireneusz
Keyword(s):  
Cancer Therapy ◽  
Complex Compounds ◽  
Anticancer Properties

Structure of the complexes of ethylenediphosphinetetraacetic acid in solution

1985 ◽  
Vol 50 (2) ◽  
pp. 445-453 ◽  
Author(s):  
Jana Podlahová ◽  
Josef Šilha ◽  
Jaroslav Podlaha
Keyword(s):  
Metal Ion ◽  
Carboxyl Groups ◽  
Complex Solution ◽  
Square Planar ◽  
Weak Complexes ◽  
Carboxylic Groups ◽  
Uv Visible ◽  
The Stability ◽  
Tetrahedral Complexes ◽  
Free Carboxyl

Ethylenediphosphinetetraacetic acid is bonded to metal ions in aqueous solutions in four ways, depending on the type of metal ion: 1) through an ionic bond of the carboxylic groups to form weak complexes with a metal:ligand ratio of 1 : 1 (Ca(II), Mn(II), Zn(II), Pb(II), La(III)); 2) through type 1) bond with contributions from weak interaction with the phosphorus (Cd(II)); 3) through coordination of the ligand as a monodentate P-donor with the free carboxyl groups with formation of 2 : 1 and 1 : 1 complexes (Cu(I), Ag(I)); 4) through formation of square planar or, for Hg(II), tetrahedral complexes with a ratio of 1 : 2 with the ligand as a bidentate PP-donor with the free carboxyl groups (Fe(II), Co(II), Ni(II), Pd(II), Pt(II)). On acidification of the complex solution, the first two protons are bonded to the carboxyl groups. The behaviour during further protonation depends on the type of complex: in complexes of types 1) and 2) phosphorus is protonated and the complex dissociates; in complexes of types 3) and 4) the free carboxyl groups are protonated and the phosphorus-metal bond remains intact. The results are based on correlation of the stability constants, UV-visible, infrared, 1H and 31P NMR spectra and magnetic susceptibilities of the complexes in aqueous solution.

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