The Influence of Sulphur On the Color of Azo Dyes
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93 18 . 40 White needles = (SCH 2 CH 2 )S 6 4 . 5 88 93 28 . 60 28 . 54 Red needles = (SCH 2 CH 2 )S0 2 6 5 97 149 26 . 12 26 . 22 White needles Previously prepared, the melting points being given as 108 and 105, respectively. 6 In the sulfate ion of the sulfate.
(c) Sulfones from the Dinitro-diphenyl Compounds Fromm and Wittmann 32 prepared dinitro-diphenyl sulfone by oxidizing the sulfide dissolved in acetic acid with chromic acid. Following the procedure described above for preparing mononit...ro sulfones, we obtained disulfones in all cases except from, '-dinitro-diphenyl-dithiomethane, where the two sulfur atoms are separated only by a CH 2 group and oxida- tion breaks the molecule, yielding only soluble sulfonic acids. Various oxidizing agents were tried with the same result. In the case where the two sulfur atoms were separated by two CH 2 groups, no difficulty was encountered even when three sulfur atoms are present.
The sulfones are insoluble in water, slightly soluble in alcohol, and fairly soluble in boiling 80% acetic acid, the last member, however, being insoluble in this, as the solubility of the series decreases markedly with the increase in molecular weight.
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To quickly assess the difficulty of the text, read a short excerpt:
93 18 . 40 White needles = (SCH 2 CH 2 )S 6 4 . 5 88 93 28 . 60 28 . 54 Red needles = (SCH 2 CH 2 )S0 2 6 5 97 149 26 . 12 26 . 22 White needles Previously prepared, the melting points being given as 108 and 105, respectively. 6 In the sulfate ion of the sulfate.
(c) Sulfones from the Dinitro-diphenyl Compounds Fromm and Wittmann 32 prepared dinitro-diphenyl sulfone by oxidizing the sulfide dissolved in acetic acid with chromic acid. Following the procedure described above for preparing mononit...ro sulfones, we obtained disulfones in all cases except from, '-dinitro-diphenyl-dithiomethane, where the two sulfur atoms are separated only by a CH 2 group and oxida- tion breaks the molecule, yielding only soluble sulfonic acids. Various oxidizing agents were tried with the same result. In the case where the two sulfur atoms were separated by two CH 2 groups, no difficulty was encountered even when three sulfur atoms are present.
The sulfones are insoluble in water, slightly soluble in alcohol, and fairly soluble in boiling 80% acetic acid, the last member, however, being insoluble in this, as the solubility of the series decreases markedly with the increase in molecular weight.
What to read after The Influence of Sulphur On the Color of Azo Dyes?
You can find similar books in the "Read Also" column, or choose other free books by William Robert Waldron to read onlineMoreLess
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