Investigation into chemism of multivalent element ions reactions with organic reagents

Spectrophotometric invectigations have been made in to the interaction of indium with alizarin red S (alizarin-3-sulphonic acid) when extracting it with chloroform. The complex is extracted as an ion association with diphenylguanidine, in which the ratio In:Aliz:DPG = 1:3:3. The central ion In3+ substitutes three protons in three particles of the ligand. The structure of the complex being extracted is discussed. Molar absorbancy index of the complex in the chloroform extract (2.8x104) is twice greater than in the aqueous solution. The effect of the pH value on the formation of the indium complexes extracted is studied