A comprehensive investigation of variations in melting ranges and NMR data of 2,4-dinitrophenylhydrazine derivatives

Journal of the Chemical Society. Perkin Transactions 2

Volumn , Issue 10, 1998, Pages 2195-2200

  Tayyari, Sayyed Faramarz ^a   Speakman, Jeffrey L ^a   Arnold, Macklin B ^a   Cai, Wen ^a   Behforouz, Mohammad ^a  

^a BALL STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001534180     PISSN: 03009580     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (32)

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3. Six melting ranges from 145 to 168.5°C have been reported for the acetaldehyde DNP (see references 4 and 5).
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13. M. Behforouz, J. L. Bolan and M. S. Flynt, J. Org. Chem., 1985, 50, 1186 and references therein. This method involves a simple sodium bicarbonate wash of the crude DNP precipitate obtained by the conventional procedure followed by recrystallization. Also see: J. Chem. Educ., 1986, 63, 723.
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31. Syn and anti designate the relative positions of the larger group on carbon (L) and the lone electron pair of nitrogen in the C=N containing compounds. If the two are on the same side, the configuration is syn (E) and if they are on the opposite sides, it is anti (Z). See E. L. Eliel, Stereochemistry of Carbon Compounds, McGraw-Hill, New York, 1962, 321.
32. Solutions containing the desired amounts of acids were prepared as follows: Trifluoroacetic acid (285 mg, 1 mmol) was dissolved in 10 mL of the undeuterated solvent and then using an automatic pipeter the solution was diluted further. The required volume (10-40 μl) of this mixture was dissolved in 1 mL of the desired deuterated solvent and the resulting mixture was used to dissolve the DNP samples.