2013
DOI: 10.18052/www.scipress.com/ilcpa.11.77
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Spectral Correlations and Antimicrobial Activities of Some (E)-N-Benzylidenepyridin-2-Amines

Abstract: A series of aryl imines have been synthesized by Fly-ash: PTS catalyzed microwave assisted oxidative coupling of amines and aldehydes under solvent-free conditions. The yield of the imines has been found to be more than 90 %. The purity of all imines has been checked using their physical constants and spectral data as published earlier in literature. The UV λ max C=N(nm), infrared νC=N(cm -1 ), NMR δ(ppm) of CH=N and C=N spectral data have been correlated with Hammett substituent constants and F and R paramete… Show more

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Cited by 15 publications
(28 citation statements)
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“…13 In nuclear magnetic resonance spectra, the proton or the 13 The assigned CH proton chemical shifts (ppm) are correlated with Hammett σ constants and F and R parameters [55][56][57][58][59][60][61][62][63][64][65][66]. The results of statistical analysis [55][56][57][58][59][60][61][62][63][64][65][66] are presented in Table 3. The obtained correlations were satisfactory for CH chemical shifts with Hammett σ, σ + , σ I substituent constants and R parameters excluding H, 4-OCH 3 , 4-CH 3 and 4-NO 2 substituents.…”
Section: 2 1 H Nmr Spectral Studymentioning
confidence: 99%
“…13 In nuclear magnetic resonance spectra, the proton or the 13 The assigned CH proton chemical shifts (ppm) are correlated with Hammett σ constants and F and R parameters [55][56][57][58][59][60][61][62][63][64][65][66]. The results of statistical analysis [55][56][57][58][59][60][61][62][63][64][65][66] are presented in Table 3. The obtained correlations were satisfactory for CH chemical shifts with Hammett σ, σ + , σ I substituent constants and R parameters excluding H, 4-OCH 3 , 4-CH 3 and 4-NO 2 substituents.…”
Section: 2 1 H Nmr Spectral Studymentioning
confidence: 99%
“…These absorption maxima (λmax, nm) of these chalcones International Letters of Chemistry, Physics and Astronomy Vol. 24were correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analysis [1, 4,[22][23][31][32][33][34][35][36][37][38]. Hammett correlation involving the group frequencies and absorption maxima, the form of the Hammett equation employed is λmax = ρσ + λ 0…”
Section: Uv Spectral Studymentioning
confidence: 99%
“…From the Table 3, the results of statistical analysis [1, 4,[22][23][31][32][33][34][35][36][37][38] of these UV absorption maxima (λmax, nm) data with Hammett substituent constants, except that with 4-NO 2 substituent have shown satisfactory correlations with Hammett substituent constant σ (r = 0.905) and except those with 4-Br and 4-NO 2 substituents have shown satisfactory correlations with Hammett substituent constant σ + (r = 0.906). The remaining Hammett substituent constants σ I, σ R and F and R parameters have shown poor correlations (r < 0.900).…”
Section: Uv Spectral Studymentioning
confidence: 99%
“…The νCO, NH, C-N, C-Cl, C-F, C=N stretching frequencies (cm -1 ) of these imines have been recorded and are presented in Table 2. These data are correlated with Hammett substituent constants [59][60][61]64,[66][67][68][69][70][71][72] and Swain-Lupton's [62] parameters. In this correlation the structure parameter Hammett equation employed is as shown in equation (1).…”
Section: Ir Spectral Studymentioning
confidence: 99%