Reactions of Rhodium and Iridium Chloride and Chlorostannate Complexes with N-(2,6-Dimethyl-4-Methylenetriphenylphosphonium Chloride)phenyl-N-Propylthiourea Groups Covalently Grafted to the Silica Surface

摘要

Characteristic features of the interaction of iridium and rhodium chloride and chlorostannate complexes with N-(2,6-dimethyl-4-methylenetriphenylphosphonium chloride)phenyl-A7'-propylthiourea groups covalently fixed on the silica gel surface were studied. Comparison of the sorption isolation of rhodium and iridium by silicas with N-(2,6-dimethyl-4-methylenetriphenylphosphonium chloride)phenyl-N-propylthiourea and N-allyl-n-propylthiourea groups has shown that, at room temperature, the reaction proceeds by an anion exchange mechanism. At higher temperatures or during storage, rearrangement takes place on the sorbent surface, resulting in the migration of the metal ion from the anion exchange group to be coordinated to the sulfur atom of the thiourea fragment.