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Why are 2,4-dinitrophenylhydrazones better derivatives than phenylhydrazones? Could you site a source for this?
Accepted Answer
2,4-dinitrophenylhydrazones are generally considered better derivatives than phenylhydrazones for several reasons:
Increased stability: The nitro groups in 2,4-dinitrophenylhydrazones make the derivative more stable and less prone to decomposition. This is because the electron-withdrawing nitro groups stabilize the hydrazone moiety.
Improved melting points: The nitro groups also increase the melting point of the derivative, making it easier to identify and purify.
Enhanced crystallinity: 2,4-dinitrophenylhydrazones often form well-defined crystals, which are easier to identify and analyze.
Reference:
Vogel's Textbook of Practical Organic Chemistry by Brian S. Furniss, Antony J. Hannaford, Peter W. G. Smith, and Alan R. Tatchell.
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