Simulation of the effects of complex-formation equilibria in electrophoresis: III. Simultaneous effects of chiral selector concentration and background electrolyte pH

2012 ◽  
Vol 33 (19-20) ◽  
pp. 3012-3020 ◽  
Author(s):  
Jana Svobodová ◽  
Martin Beneš ◽  
Pavel Dubský ◽  
Gyula Vigh ◽  
Bohuslav Gaš
Keyword(s):  
Complex Formation ◽  
Background Electrolyte ◽  
Chiral Selector ◽  
Complex Formation Equilibria ◽  
Formation Equilibria ◽  
Electrolyte Ph

scholarly journals Complex Formation Equilibria between Ag(I) and Thioureas in Propan-2-ol

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Domenico De Marco
Keyword(s):  
Complex Formation ◽  
Background Electrolyte ◽  
Complex Formation Equilibria ◽  
Entropy Changes ◽  
Enthalpy And Entropy Changes ◽  
Formation Equilibria ◽  
Enthalpy And Entropy ◽  
The Stability ◽  
Tetramethyl Thiourea ◽  
Stepwise Formation

The complex formation equilibria between Ag(I) and thiourea (Tu), N methyl-Thiourea (MeTu), N,N′-dimethyl-Thiourea (Me2Tu), N,N,N′,N′ Tetramethyl-Thiourea (Me4Tu), N-ethyl-Thiourea (EtTu), N,N′ diethyl-Thiourea (Et2Tu), and N,N′-Ethylen-Thiourea (EnTu) in propan-2-ol as solvent medium have been investigated by potentiometry within the temperature range 10°C–40°C and self-determined ionic medium by (AgNO3) concentration range 6.36·10-6–3.83·10-5 m·dm−3 (no background electrolyte added). The experimental results can be interpreted with the stepwise formation of tris-coordinated complexes AgLn  (n=1–3; hereafter charge is omitted). The stability constants log βn and the standard thermodynamic changes in enthalpy (ΔHn°) and entropy (ΔSn°) for overall complex formation reactions AgI+nL=AgLn (n=1–3) have been evaluated. The reactions are exothermic in nature and entropy disfavored for all the investigated ligands. The standard enthalpy and entropy changes for the stepwise reactions AgLn-1+L=AgLn have been evaluated by difference ΔΔHn°=ΔHn°-ΔHn-1° and ΔΔSn°=ΔSn°-ΔSn-1°. The stepwise enthalpy are mutually linearly related to the corresponding entropy changes with isoequilibrium temperatures Tiso=285, 305, and 363 K for n=1, 2, or 3 respectively.

Complex formation equilibria between astatine(I) and sulphur-containing chelating ligands

Polyhedron ◽  
1991 ◽  
Vol 10 (1) ◽  
pp. 11-17 ◽  
Author(s):  
R. Ludwig ◽  
S. Fischer ◽  
R. Dreyer ◽  
R. Jacobi ◽  
J. Beger
Keyword(s):  
Complex Formation ◽  
Chelating Ligands ◽  
Complex Formation Equilibria ◽  
Formation Equilibria

Complex formation equilibria in the binary Zn2+–oxalate and In3+–oxalate systems

2003 ◽  
pp. 2698-2703 ◽  
Author(s):  
Ermanno Vasca ◽  
Diego Ferri ◽  
Carla Manfredi ◽  
Loredana Torello ◽  
Cecilia Fontanella ◽  
...  
Keyword(s):  
Complex Formation ◽  
Complex Formation Equilibria ◽  
Formation Equilibria

Complex formation equilibria in iron(III)-L-alanine system

1993 ◽  
Vol 18 (5) ◽  
pp. 457-461 ◽  
Author(s):  
Predrag Djurdjević ◽  
Ratomir Jelić
Keyword(s):  
Complex Formation ◽  
Complex Formation Equilibria ◽  
Formation Equilibria

Complex formation equilibria of polyamine ligands with copper(II) and zinc(II)

2019 ◽  
Vol 194 ◽  
pp. 26-33 ◽  
Author(s):  
Valeria M. Nurchi ◽  
Guido Crisponi ◽  
Gavino Sanna ◽  
Inmaculada Pérez-Toro ◽  
Juan Niclos-Gutierrez ◽  
...  
Keyword(s):  
Complex Formation ◽  
Complex Formation Equilibria ◽  
Formation Equilibria

Equilibrium Studies of Alkyltin(IV) Complexes with D-Glucosamine

1997 ◽  
Vol 62 (7) ◽  
pp. 1023-1028 ◽  
Author(s):  
Mohamed M. Shoukry ◽  
Samir M. El-Medani
Keyword(s):  
Complex Formation ◽  
Stability Constants ◽  
Acid Base ◽  
Complex Formation Equilibria ◽  
Equilibrium Studies ◽  
Formation Equilibria ◽  
Effects Of Temperature ◽  
The Stability

The acid-base and complex-formation equilibria involving glucosamine and its complexes with alkyltin(IV) chlorides have been studied by potentiometric technique. The results prove to a formation of 1 : 1 complex with trialkyltin(IV) and both 1 : 1 and 1 : 2 complexes with dialkyltin(IV) species. The stability constants in water were determined, the effects of temperature (from 15 to 35 °C) and ethanol (up to 88 vol.%) was studied and the speciation of the complexes was resolved.

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