Studies on Thiohydroxamic Acids and Their Metal Chelates. V. Infrared Spectra of Metal Chelates of Thiohydroxamic Acids

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The infrared spectra of some metal salts of thiohydroxamic acids (I) and O-methyl-thiohydroxamic acids (II) were investigated, and it was decided that the salts have the structures including oxime group, [chemical formula] M⁺ⁿ (M=Metal ion), by deuteration method. From the comparisons of the band frequencies which are attributed to the oxime group with those of the corresponding derivatives (S-methyl derivatives and disulfides of I or II) it was shown that some transition metal salts have the chelate structures. Although it was difficult to decide finally whether the chelate structures are the S-O coordinated or the S-N coordinated type, the former seemed to be more probable.