Complex formation in binary systems Co(II)-1-nitroso-2-hydroxynaphthalene and Co(II)-2-nitroso-1-hydroxynaphthalene in Co-2[Fe(CN)(6)]-gelatin-immobilized matrices

Complexation processes were studied that occur in cobalt(II) hexacyanoferra te(II) gelatin-immobilized matrix systems when they come in contact with aq ueous solutions of 1-nitroso-2-hydroxynaphthalene and its isomer, 2-nitroso -1-hydroxynaphthalene (HL) in an alkaline medium (pH similar to 12). Under these specific conditions, predominantly coordination compounds of Co(II) w ith the corresponding ligand are formed with the ratio Co2+ : L- = 1 : 2, w hereas the 1 : 3 complexes of Co(III) are formed in insignificant amounts.