scholarly journals Synthesis, identification and computational studies of novel Schiff bases N-(2,6-dibenzylidenecyclohexylidene)-N′-(2,4-dinitrophenyl)hydrazine derivatives

2020 ◽  
Vol 2 (11) ◽  
Author(s):  
Md Mizanur Rahman Badal ◽  
Md Zakaria Hossain ◽  
Md Maniruzzaman ◽  
Mohammad Abu Yousuf
Keyword(s):  
Schiff Bases ◽  
Computational Studies ◽  
Hydrazine Derivatives

Hydrazine Derivatives of β-Dicarbonyl Compounds, Part I. Studies on Some Benzoylacetaldehyde Aroylhydrazones

1978 ◽  
Vol 33 (12) ◽  
pp. 1527-1534 ◽  
Author(s):  
Latif Rateb ◽  
B. Azmy ◽  
M. A. Nashed ◽  
M. F. Iskander
Keyword(s):  
Schiff Bases ◽  
Nmr Spectra ◽  
Open Chain ◽  
Dicarbonyl Compounds ◽  
Hydrazine Derivatives ◽  
H Nmr ◽  
Imine Form ◽  
Derivatives Of

Abstract A series of benzoylacetaldehyde benzoylhydrazones were prepared and characterised. Their UV, IR, and 1H NMR spectra suggest the enol-imine structure rather than the keto-imine form of analogous Schiff bases. The pKa values of these aroylhydrazones were also measured and correlated with the Hammet substitution constants. Attempted cyclizations of these open-chain aroylhydrazones afforded the corresponding 5-hydroxy-2-pyrazoline compounds rather than the expected pyrazoles.

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