Kinetics of molybdenum(VI) complexation with o,o '-dihydroxyazo compounds or heterocyclic azo compounds in the presence of hydroxylamine

The kinetics of complexation in the system molybdenum(VI)-azo compound-hydr oxylamine was studied. o,o'-Dihydroxyazo compounds, such as Lyumogallion IR EA and Magnezon IREA, and heterocyclic azo compounds, such as 4-(2-pyridyla zo)resorcinol and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol, were studi ed. The formation of mixed-ligand complexes with the ratio of components 1 : 1 : 1 was detected. Rate constants, activation energies, and stability co nstants of the forming compounds were evaluated. It was concluded that the reagents under study are promising for the analytical chemistry of molybden um.