scholarly journals STABILITY OF COORDINATION COMPOUNDS OF PECTIN POLYSACCHARIDES MODIFIED BY BENZOIC AND AMINOBENZOIC ACIDS WITH IONS OF COPPER (II) IN AQUEOUS SOLUTIONS

2019 ◽  
Vol 8 (2) ◽  
pp. 328
Author(s):  
R. Kh. Mudarisova ◽  
A. F. Sagitova ◽  
S. V. Kolesov
Keyword(s):  
Aqueous Solutions ◽  
Coordination Compounds ◽  
Pectin Polysaccharides ◽  
Aminobenzoic Acids

Coordination compounds of norbornadiene with silver tetrafluoroborate

1968 ◽  
Vol 46 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Harold W. Quinn
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Infrared Spectra ◽  
Coordination Compounds ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrated Complexes ◽  
Crystalline Complexes Of

Crystalline complexes of norbornadiene with silver tetrafluoroborate have been obtained both from anhydrous and aqueous solution. While both solutions yield complexes of stoichiometry AgBF4•C7H8 and 2AgBF4•3C7H8, those from the aqueous solutions also contain water of crystallization. The infrared spectra show that norbornadiene is similarly complexed in both the anhydrous and hydrated complexes but that the coordination in the 1:1 complex is different from that in the 2:3 complex. The anhydrous and hydrated 1:1 complexes have the same X-ray diffraction powder patterns while those of 2:3 complexes are different.

Coprecipitation of 60Co from aqueous solutions with solid phases of various coordination compounds

2013 ◽  
Vol 55 (2) ◽  
pp. 175-180 ◽  
Author(s):  
S. A. Kulyukhin ◽  
N. A. Konovalova ◽  
M. P. Gorbacheva ◽  
L. V. Mizina ◽  
I. A. Rumer
Keyword(s):  
Aqueous Solutions ◽  
Coordination Compounds ◽  
Solid Phases

Coordination compounds of substituted 1,10-Phenanthrolines and related dipyridyls. VIII. Complexes of silver and 2,9-Dimethyl-1,10-phenanthroline

1965 ◽  
Vol 18 (9) ◽  
pp. 1345 ◽  
Author(s):  
JR Hall ◽  
RA Plowman ◽  
HS Preston
Keyword(s):  
Aqueous Solutions ◽  
Organic Solvents ◽  
Infrared Spectra ◽  
Coordination Compounds ◽  
Molecular Weights ◽  
Low Solubility ◽  
Covalently Bound

Addition of 2,9-dimethyl-1,10-phenanthroline (dmp) in organic solvents to aqueous solutions of silver(1) salts yielded mono complexes represented by AgXdmp, where X = NO3, Cl, Br, I; 2X = SO4, and bis complexes Ag(dmp),Y, where Y = NO3, Cl04. Water of crystallization was present only in the sulphate. The mono complexes were empirically three-coordinate. Low solubility prevented the determination of molecular weights. Infrared spectra indicated that the polyatomic anions were covalently bound. The 1 : 1 electrolyte [Ag(dmp)(py)]ClO4 subsequently prepared seemed to be an example of three-coordination. The bis complexes were 1 : 1 electrolytes in nitrobenzene and were most likely tetrahedral.

scholarly journals Complexation processes in “PbCl2-N2H4CS” aqueous solutions during deposition of lead sulphide films

2021 ◽  
Vol 23 (4) ◽  
pp. 543-547
Author(s):  
Victor N. Semenov ◽  
Vitaly V. Volkov ◽  
Natalia V. Pereslytskikh
Keyword(s):  
Aqueous Solutions ◽  
Coordination Compounds ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Lead Chloride ◽  
Lead Sulphide ◽  
New Approach ◽  
Complex Forms ◽  
Selection Of

In this study, we proposed a new approach to assessing the processes of complexation in aqueous solutions using the example of the interaction of lead chloride with thiourea. The goal of this study was the investigation of processes of complexation in “PbCl2-N2H4CS” aqueous solutions and determination of the regions of dominance of thiourea coordination compounds, which are precursors during the deposition of lead sulphide films.Based on the diagrams and cross section lines of equal fractions constructed in three-dimensional space, the regions of dominance of all complex forms existing in the studied solution were found. Such a graphic image is the most informative, since it allows selection of the concentration ranges of the predominance of certain coordination compounds, especially thiourea complexes, which are precursors during the deposition of lead sulphide films. It was shown that an increase in the concentration of N2H4CS led to an increase in the total fraction of thiourea complexes: for a twofold excess of N2H4CS its fraction was 0.25, for a threefold excess it was 0.35, for a fourfold excess it was 0.5, for a fivefold excess it was 0.7.

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