REACTIONS OF BIMETALLIC COMPLEXES OF PALLADIUM (II) WITH STANNUM(II) LIGANDS IN WATER SOLUTIONS OF HYDROCHLORIC ACID
<i>Intramolecular red-ox reactions of Pd(II) - St complexes in 1M water solutions of HCl were studied with electron spectrophotometer methods. It was supposed that at the early stages the reduction products consist of hetero-nuclear clusters of Pd</i><sub><i>3</i></sub><i>Sn</i><sub><i>x</i></sub><i> (х = 5, 8) type with low oxidation degrees of Palladium later forming colloid particles. It was found that the resulting product of Pd(II)-Sn complexes reactions is an Pd</i><sub><i>3</i></sub><i>Sn alloy in the form of micro dispersed powder. The average diameter of queasy spherical particles is 70 nm with the range of 30 - 110 nm. Diffraction pictures of the Pd</i><sub><i>3</i></sub><i>Sn powders produced in different condition are typical for structures with side-central cubic network (period а = 3.98 А</i><sup><i>0</i></sup><i>). Element electron condition in Pd</i><sub><i>3</i></sub><i>Sn powders is described by the features of X-ray photoelectron spectra. The formal stoichiometry of the reaction 3Pd(II) + 5Sn(II) = Pd</i><sub><i>3</i></sub><i>Sn + 4Sn(IV).The method of nanodispersed intermetallic Pd</i><sub><i>3</i></sub><i>Sn powders synthesis from water solutions of hydrochloric, sulphuric, hydrofluorine and citric acids was developed. It was found that the acid nature does not influence the reaction features of Pd(II)-Sn complex. The influence of such factors as the medium acidity, temperature, palladium concentration in solution and the contact area of the solution with air have been found.</i>