THERMODYNAMICS OF ACID-BASIC EQUILIBRUM IN AQUEOUS SOLUTIONS OF ORTHOPHOSPHORIC AND 1-AMINO-3-(N-GLYCINE) PROPYLIDENE-1,1-DIPHOSPHONIC ACIDS

The investigation objects are the orthophosphoric and 1-amino-3-(N-glycine)propyledene-1,1-diphosphonic acids. The aim is to investigate the influence of temperature, nature and concentration of background electrolyte on the thermodynamic characterictics in the dissociation of 1-amino-3-(N-glycine) propyledene-1,1-diphosphonic acids in the aqueous solutions, to consider and analyze the obtained data, to reveal the general regularities and special features of the chelate behaviour in the aqueous solution. The step dissociation constants of 1-amino-3-(N-glycine) propyledene-1,1-diphosphonic acid at 298 K have been determined firstly. The thermal effects of chelate dissociation processed at some temperature values and ionic force have been obtained firstly. The total thermodynamical dissociation characteristics on the new compound in aqueous solution has been represented. The obtaibed results permit to determine the totality of passing processed in the investigated systems and are used as a reference material in the calculations; they are applicable for development of the medicinal and diagnostic agents. Application field: analytical chemistry, pharmacochemistry; production of manures, refining, cleaning of products, catalysis of hydrocarbone dehydrotation and polymerization processesAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio