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D-???????????
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D-??????????? ??
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- 115-116 °C
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- 620.471±55.00 °C(Press: 760.00 Torr)(predicted)
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- 1.399±0.14 g/cm3(Temp: 25 °C; Press: 760 Torr)(predicted)
- ?? ?? (pKa)
- 12.378±0.20(predicted)
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Purification Methods
Crystallise the hydrazone from 70% aqueous EtOH or EtOH/Et2O. Three forms have been described: “” form m 159o, 160o which mutarotates from [] D -87o to -50o (H2O) [Fischer Ber 20 821 1887, Behrends Justus Liebigs Ann Chem 353 106 1907], “” form m 140-141o, 142o which mutarotates from [] 20D -2o to -50o (H2O) [Behrends & Lohr Justus Liebigs Ann Chem 362 78 1908], and Skraup’s form m 115-116o which mutarotates from []D -70o to -47o (H2O) [Skraup Monatsh Chem 10 406 1889, Butler & Crechter J Am Chem Soc 51 3161 1921]. These mutarotate to the formazan.[Beilstein 1 IV 4322, Mester & Major J Am Chem Soc 77 4297 1955, Stanek et al. The Monosaccharides, Academic Press 1963, pp 539-541, 543.]D-??????????? ?? ?? ? ???
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