Synthesis and the Formation Analysis of Ni (II), Zn (II) and L-Glutamine Binary Complexes in Dimethylformamide-Aqueous mixture

The absorption spectra of the binary complexes of lanthanoids with bromopyrogallol red were measured and the formation of ternary complexes with cation active tenside, Septonex, was studied. Optimal conditions were found for the formation of these complexes and the possibility of their use in the photometric determination of lanthanoids was demonstrated on several examples.

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Spectrophotometric study of the interaction of Chromazurol S and Eriochromazurol B with surface active substances - tensides

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19811090 ◽

1981 ◽

Vol 46 (5) ◽

pp. 1090-1106 ◽

Cited By ~ 10

Author(s):

Irena Burešová ◽

Vlastimil Kubáň ◽

Lumír Sommer

Keyword(s):

Critical Micellar Concentration ◽

Spectrophotometric Study ◽

Conditional Stability ◽

Acid Base ◽

Binary Complexes ◽

Chromazurol S ◽

Acid Base Equilibrium ◽

Poorly Soluble ◽

Conditional Stability Constants ◽

Triton X

The acid-base and optical properties of Chromazurol S and Eriochromazurol B in the presence of 1 . 10-6 - 2 . 10-2M solutions of cetylpyridinium bromide, cetyltrimethylammonium bromide and 1-ethoxycarbonylpentadecyltrimethylammonium bromide (Septonex) and 0.001-1.0% w/v solutions of octylphenolpolyethylene glycol ether (Triton X-100), polyoxyethylenemonolauryl ether (Brij 35) and lauryl sulphate sodium salt were determined by graphical and numerical interpretation of absorbance curves. The poorly soluble ion associates, which can be extracted into chloroform and which have the defined composition [LH4-nn-.n T+] or [LH3-nn-.n T+] are formed at submicellar concentration of the tenside. In regions close to the critical micellar concentration of the tenside, soluble binary complexes of the acid-base forms of the reagent are formed with tenside micelles. The conditional stability constants of the reagent acid-base equilibrium depend on the type and concentration of the tenside, on the reagent concentration, on the concentration and type of inorganic acid anions and on the ionic strength of the solution. The mechanism of interaction of the reagent with the tenside and the probable structure of the binary species are discussed.

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Equilibrium Studies of Binary and Ternary Complexes of Palladium(II) Involving Amino Acids

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19931103 ◽

1993 ◽

Vol 58 (5) ◽

pp. 1103-1108 ◽

Cited By ~ 4

Author(s):

Mohamed M. Shoukry ◽

Eman M. Shoukry

Keyword(s):

Amino Acids ◽

Relative Stability ◽

Ternary Complex ◽

Formation Constants ◽

Ternary Complexes ◽

Conductivity Measurements ◽

Equilibrium Studies ◽

Binary And Ternary Complexes ◽

Binary Complexes

The formation constants of the binary and ternary complexes of palladium(II) with diethylenetriamine and amino acids as ligands have been determined potentiometrically at 25 °C in 0.1 M NaNO3 solution. The relative stability of each ternary complex was compared with that of the corresponding binary complexes in terms of ∆logK values. The mode of chelation was ascertained by conductivity measurements.

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Relativistic Effects on NMR Parameters of Halogen-Bonded Complexes

Molecules ◽

10.3390/molecules24234399 ◽

2019 ◽

Vol 24 (23) ◽

pp. 4399 ◽

Cited By ~ 4

Author(s):

Ibon Alkorta ◽

José Elguero ◽

Manuel Yáñez ◽

Otilia Mó ◽

M. Merced Montero-Campillo

Keyword(s):

Relativistic Effects ◽

Lewis Base ◽

Coupling Constants ◽

Basic Site ◽

Lewis Bases ◽

Nmr Parameters ◽

Quadrupolar Coupling ◽

Binary Complexes ◽

Computational Level ◽

Bonded Complexes

Relativistic effects are found to be important for the estimation of NMR parameters in halogen-bonded complexes, mainly when they involve the heavier elements, iodine and astatine. A detailed study of 60 binary complexes formed between dihalogen molecules (XY with X, Y = F, Cl, Br, I and At) and four Lewis bases (NH3, H2O, PH3 and SH2) was carried out at the MP2/aug-cc-pVTZ/aug-cc-pVTZ-PP computational level to show the extent of these effects. The NMR parameters (shielding and nuclear quadrupolar coupling constants) were computed using the relativistic Hamiltonian ZORA and compared to the values obtained with a non-relativistic Hamiltonian. The results show a mixture of the importance of the relativistic corrections as both the size of the halogen atom and the proximity of this atom to the basic site of the Lewis base increase.

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Supramoleküle aus Kronenethern und geminalen Sulfonen: Synthese von vier binären Komplexen und Kristallstruktur von (CH2CH2O)4·2H 2C(SO2C2H5)2/Supramolecules of Crown Ethers with Geminal Sulfones: Synthesis of Four Binary Complexes and Crystal Structure of (CH2CH2O )4·2H2C(SO2C2H5)2

Zeitschrift für Naturforschung B ◽

10.1515/znb-1995-0705 ◽

1995 ◽

Vol 50 (7) ◽

pp. 1018-1024 ◽

Cited By ~ 2

Author(s):

Axel Michalides ◽

Dagmar Henschel ◽

Armand Blaschette ◽

Peter G. Jones

Keyword(s):

Monoclinic Space Group ◽

Triclinic Space Group ◽

Space Group ◽

X Ray ◽

X Ray Crystallography ◽

H Nmr ◽

Binary Complexes ◽

Cyclic Polyethers ◽

Adjacent Unit ◽

Methylene Group

In a systematic search for supramolecular complexes involving all combinations of the cyclic polyethers 12-crown-4 (12C4), 15-crown-5 (15C 5), 18-crown-6 (18C 6) and dibenzo- 18-crown-6 (DB -18C6), and the geminal di- or trisulfones H2C(SO 2Me)2, H2C (SO2Et)2 and HC (SO2Me)3-n (SO2Et)n (n = 0 -3 ) , only the following four complexes could be isolated and unequivocally characterized by elemental analysis and 1H NMR spectroscopy: [(12C4){H2C (SO2Et)2}2] (3), [(18C6){H2C (S O2Me)2}] (4), [(DB -18C 6){H2C (SO2Et)2}] (5) and [(D B -18C 6)2{HC (SO2Me )(SO2Et)2}3] (6). The structure of 3 (triclinic, space group P1̄) consists of crystallographically centrosymmetric formula units, in which the disulfone molecules are bonded on each side of the ring by two C -H ··· O(crown) interactions originating from the central methylene group (H···O 213 pm) and from the methylene group of one EtSO2 moiety ( H ··· O 237 pm). Formula units related by translation are connected into parallel strands by a third type of reciprocal C -H ···O bond (H ···O 232 pm) between the second H atom of the central methylene group and a sulfonyl oxygen atom of the adjacent unit. The structure of 4 (monoclinic, space group C2/c) showed severe disorder of the crown ether and could not be refined satisfactorily. Compounds 5 and 6 crystallized as long and extremely thin fibres, indicative of linear-polymeric supramolecular structures; single crystals for X-ray crystallography were not available.

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IR and NMR properties of N-base:PH2F:BeX2 ternary and corresponding binary complexes stabilised by pnicogen and beryllium bonds

Molecular Physics ◽

10.1080/00268976.2021.1905191 ◽

2021 ◽

pp. e1905191

Author(s):

Janet E. Del Bene ◽

Ibon Alkorta ◽

José Elguero

Keyword(s):

Binary Complexes ◽

Nmr Properties

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Investigations of ternary complexes of Co(II) and Ni(II) with thiodiacetate anion and 1,10-phenanthroline or 2,2’-bipyridine in aqueous solutions

Open Chemistry ◽

10.1515/chem-2015-0048 ◽

2014 ◽

Vol 13 (1) ◽

Author(s):

Dariusz Wyrzykowski ◽

Joanna Pranczk ◽

Dagmara Jacewicz ◽

Aleksandra Tesmar ◽

Bogusław Pilarski ◽

...

Keyword(s):

Aqueous Solutions ◽

Substitution Reactions ◽

Experimental Conditions ◽

Kinetic Measurements ◽

Hydroxo Complexes ◽

Binary Complexes ◽

Vis Spectroscopy ◽

Potentiometric Titration Method ◽

The Stability ◽

Ph Range

AbstractA potentiometric titration method (PT) and a stopped-flow kinetic technique monitored by a UV−Vis spectroscopy have been used to characterize the stability of series of Co(II)- and Ni(II)-thiodiacetato complexes, M(TDA), in the presence of 1,10-phenanthroline (phen) or 2,2’-bipyridine (bipy) in aqueous solutions. The stability constants of the binary (1:1), ternary (1:1:1) as well as the resulting hydroxo complexes were evaluated and compared to the corresponding oxydiacetate complexes. Based on the species distribution as a function of pH the relative predominance of the species in the system over a pH range was discussed. Furthermore, the kinetic measurements of the substitution reactions of the aqua ligands to phen or bipy in the coordination sphere of the binary complexes M(TDA) were performed in the 288–303 K temperature range, at a constant concentration of phen or bipy and at seven different concentrations of the binary complexes (0.2–0.5 mM). The kinetic stability of the M(TDA) complexes was discussed in relation to the experimental conditions and the kind of the auxiliary ligands (phen/bipy). Moreover, the influence of the type of primary ligand (thiodiacetate/oxydiacetate) on the substitution rate of the auxiliary ligands was also compared.

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