The complexation reaction between hydroxyl ammonium (HONH3+ ) cation with 18-crown-6 (18C6) ligand was studied in dimethylsulfoxide – water (DMSO-H2O), methanol – water (MeOH-H2O) and dimethylformamid – methanol (DMF-MeOH), binary solutions at different temperatures using conductometric method. The obtained results show that the stoichiometry of t...

The adsorption of nucleotides on the surface nanocrystalline cerium dioxide (pHpzc = 6.3) in NaCl solutions was investigated using multi-batch experiments over a wide range pH. obtained results were interpreted as formation outer and inner sphere complexes with participation phosphate moieties. Basic Stern complexation model applied to obtain quantitative equilibrium reaction constants.

Data are considered about the structure and complexation of many compounds of tin and mercury, obtained by the present authors and other investigators by means of n.m.r. spectroscopy of "9Sn and '99Hg. In the case of tin compounds important information can bc derived from thc values of chemical shifts ö(' '9Sn) and spin—spin coupling constants J("9SnC—'H), J("9Sn—C—'9F) and 3(1 '9Sn-' 3C). Conc...

The complexation reaction between salen (Bis(salicylidene)ethylenediamine) and Cu(II) cations in methanol (MeOH), 2-propanol (2-PrOH), acetonitrile (AN), tetrahydrofuran (THF), and chloroform (CHCl3) as nonaqueous solvents at 25º C has been investigated. The stoichiometry and formation constants of complexes have been determined spectrophotometrically and conductometrically by method of continu...

The interaction of the cyanidin, pelargonidin, catechin, myrecetin and kaempferol with casein and gelatin, as proline rich proteins (PRPs), was studied. The binding constants calculated for both flavonoid-casein and flavonoid-gelatin were fairly large (10 (5) -10 (7) M (-1) ) indicating strong interaction. Due to higher proline content in gelatin, the binding constants of flavonoid-gelatin (2.5...

In this study, the complexation reaction between Alprazolam (ALP) and metal ions (Zn2+, Ni2+, Cu2+ and Co2+) was investigated by using spectrophotometry in ethanol solvent. The stoichiometry of M+/ALP complexes was calculated by applying the Job, molar ratio and Continuous Changes methods and the relevant diagrams were plotted for each metal ions in each method. The results show that the obtain...

The formation constants (log K), of the complexes formed between a number of amino acids(glycine , L-valine and L-alanine) with p-sulfonatocalix [4] arene at varying temperatures (25± 0.1to 65 ± 0.1 °C) in aqueous solutions and at natural pH of p-sulphonato-calix [4] arene (pH=3.2) bymeans of UV-Vis spectrophotometeric technique have been investigated. At this pH the guestmolecule is in its cat...

The polarographic determination of stability constants of metal complexes of In(III) with 2,2 ́ oxydiacetic acid under varying temperatures, at 300K and 310K and in various aqueous-nonaqueous media, have shown the formation of 1:1 and 1:2 complexes. The values of overall stability constants of complexes have been calculated by DeFord and Hume's method which is further verified by Mihailov's meth...

The polarographic determination of stability constants of metal complexes of Thallium(I) with Ornithine monohydrogen chloride under varying temperatures 300K and 313K in aqueous media have shown the formation of 1:1, 1:2 and 1:3 complexes. The values of overall stability constants of complexes have been calculated by DeFord and Hume’s method which is further verified by Mihailov’s method. The r...