p,p-ジチメルジチゾンについて : ジチゾン誘導体の合成とその分析化学的研究(第1報)

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In order to investigate the effect of intrcduction of other groups to the phenyl groups of dithizone, methyl groups are introduced to its p-and p-positions to give p, p-dimethyldithizone and its properties have been investigated. The product showed a property of decreased acidity than dithizone and its maximum absorption wave lengths in carbon tetrachloride were at 456 mμ (450 mμ) and at 628 mμ. (620 mμ, ), with presumed molecular extinction coefficient of 46. 4× 103 (34. 6 × 103) at 628 mμ, λmax and molecular extinction coefficient, ε, at λmax of each metal complex salt in carbon tetra chloride solution was as follows. Zn2+ : λmax 546 mμ (540 mμ), ε, 98. 4 × 103 (92. 6 × 103) ; Cd2+ λmax 530 mμ (518 mμ), ε, 99. 3 × 103 (84. 2 × 103) ; Pb2+: λmax 530 mμ, (520 mμ), ε, 69. 7 × 103 (68. 6 × 103) ; Hg2+ : λmax 502 mμ, (490 mμ), ε, 80. 3 × 103(70 × 103). The values given in parentheses are those of dithizone. Examination of pH-extraction curve of each metal complex salt indicated that each metal complex salt showed lower stability than that of dithizone.
社団法人日本分析化学会の論文