Applications of High Frequency Chemical Analysis to the Studies of Metallic Complex Salts. II

Abstract

By means of the high frequency titration, the formation of metallic complex salts of pyridine, hexamine, ethylenediamine and α, α′-bipyridyl was studied. The results are as follows:1) In the pyridine complex salts of copper, nickel or zinc, the breaking points in the titration curve are approximately at 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, and 1:1.5 and 1:3 for that of calcium, and 1:2, 1:3, 1:4 and 1:5 for that of lithium.2) The curves for hexamine complex salts of nickel, copper or zinc have the breaking points approximately at 1:0.5, 1:1, 1:2 and 1:3.3) The titration curves for ethylenediamine complex salts of copper, nickel or cadmium are complicated, not showing good reproducibility. However, the breaking points are approximately at 1:1, (1:1.5), 1:2, (1:2.5), 1:3 and (1:5).4) The titration curves for α, α′-bipyridyl complex of nikel, copper, zinc, iron or manganese have the breaking points approximately at 1:1, 1:2 and 1:3. However, the titration curve for complex salts of iron and manganese, the breaking point 1:1.4 is marked unless it is extrapolated.