Preparation, spectroscopic and acidity properties of two hydrazones: an organic lab experiment

Preparation, spectroscopic and acidity properties of two hydrazones: an organic lab experiment

An undergraduate organic lab experiment is described based on the preparation of two readily accessible hydrazones. The UV-visible spectra of these N-H acids and of their conjugate bases are employed to illustrate the importance of through-conjugation in determining their acid strength and their int...

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Veröffentlicht in:Química Nova 2007-02, Vol.30 (1), p.229-231
Hauptverfasser: Rezende, Marcos Caroli, Pizarro, Claudia, Millán, Daniela
Format: Artikel
Sprache:eng
Schlagworte:
acid-base indicators
charge-transfer bands
CHEMISTRY, MULTIDISCIPLINARY
polynitrophenylhydrazones
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Zusammenfassung:An undergraduate organic lab experiment is described based on the preparation of two readily accessible hydrazones. The UV-visible spectra of these N-H acids and of their conjugate bases are employed to illustrate the importance of through-conjugation in determining their acid strength and their internal charge-transfer-band transitions.
ISSN:0100-4042
1678-7064
1678-7064
DOI:10.1590/S0100-40422007000100037