93675-55-9Relevant academic research and scientific papers
Development of novel pyrazolones by using SiO2/ZnCl2 – green approach
Neelima,Lakshmi,Sesha Maheswaramma
, (2019)
Abstract: The present research work deals with the green synthesis of substituted pyrazolone derivatives 4(a–f) from 2,4-dinitrophenylhydrazine with various substituted aromatic aldehyde and ethyl acetoacetate in the presence of silica-supported zinc chlo
Synthesis, Electronic Spectra and Solvatochromic Behaviour of 4-Arylidene-1-(2,4-dinitrophenyl)-3-methyl-2-pyrazolin-5-ones
Youssef, M.S.K.,Ibrahim, S.A.
, p. 923 - 931 (2007/10/02)
The u.v.-visible electronic spectra of 4-arylidene-1-(2,4-dinitrophenyl)-3-methyl-2-pyrazolin-5-ones (1a-f) have been studied.The different bands observed have been assigned to the proper electronic transition.Solvatochromic behaviour of these compounds is investigated by studying their visible spectra in organic solvents of different polarity.The longer wavelength band displayed by the hydroxy derivatives is assigned to an intermolecular CT transition.The H-bonding solvated complexes formed between ethanol or DMF and p-hydroxy substituted derivative are investigated.Transition moment (μCT), ΔG and Kf values of these complexes have been determined.
Synthesis, electronic spectra, and solvatochromic behaviour of 4-arylidene-1-(2,4-dinitrophenyl)-3-methyl-2-pyrazoline-5-ones
Ibrahim, Said A.,Youssef, M. S. K.
, p. 2841 - 2844 (2007/10/02)
The uv-visible electronic spectra of 4-arylidene-1-(2,4-dinitrophenyl)-3-methyl-2-pyrazoline-5-ones have been studied.The different bands observed have been assigned to the proper electronic transition.Solvatochromic behaviour of these compounds is investigated by studying their visible spectra in organic solvents of different polarities.The longer wavelength band displayed by para-hydroxy derivative is assigned to an intermolecular CT transition.The solvated H-bond complexes formed between ethanol or DMF and the para-hydroxy derivative are investigated.Transition moment (μCTL), ΔG, and Kf values of these complexes have been determined.
