Temat: Substituent constants - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Spectral studies of some (5-substituted phenyl) isoxazole based sydnones: Assessment of substituent effects
Autorzy:: Thirunarayanan, G.
Vanangamudi, G.
Sathiyendiran, V.
Powiązania:: https://bibliotekanauki.pl/articles/1194034.pdf
Data publikacji:: 2015
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Hammett substituent constants
IR spectra
NMR spectra
Spectral LFER
Sydnone isoxazole
Opis:: About ten 4-(N-(4-(5-phenylisoxazol-3-yl)phenylsufamyl)-3-(p-tolyl)-1,2,3,-oxadiazol-3-ium-5-olates were synthesised and examined their purities by literature method. The infrared and NMR spectral data of above synthesised isoxazoles were assigned and correlated with Hammett substituent constants and Swain-Lupton’s constants using regression analysis. From statistical analyses results, the effects of substituents on the spectral data have been discussed.
Źródło:: World Scientific News; 2015, 11; 44-64
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Greener synthesis and Hammett spectral Linearity’s of some 1-{[3-(furan-2-yl)-5-phenyl-4,5-dihydro-1,2-oxazol-4-yl]methyl}-4-methyl piperazines
Autorzy:: Thirunarayanan, G.
Rajarajan, M.
Sekar, K. G.
Sathiyendiran, V.
Powiązania:: https://bibliotekanauki.pl/articles/1179600.pdf
Data publikacji:: 2017
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Hammett equation and Regression analyses
Hammett substituent constants
IR and NMR spectra
Piperazines
Opis:: We have synthesized eleven numbers of 1-{[3-(furan-2-yl)-5-phenyl-4,5-dihydro-1,2-oxazol-4-yl]methyl}-4-methyl piperazines by hydroxyapatite catalyzed microwave assisted condensation method. The synthesized 1-{[3-(furan-2-yl)-5-phenyl-4,5-dihydro-1,2-oxazol-4-yl]methyl}-4-methyl piperazine compounds were characterized by means of their IR and NMR spectral data. The assigned infrared spectral νC=N, νC-O-C stretches(cm-1), NMR chemical shifts of isoxazoline (d) proton, isoxazoline (m) proton, N-CH3, C=N, C-NH2 and C-NH3 (δ, ppm) of these 1-{[3-(furan-2-yl)-5-phenyl-4,5-dihydro-1,2-oxazol-4-yl]methyl}-4-methyl piperazines were assigned and correlated with Hammett substituent constants, F and R parameters using single and multi linear regression analysis. From the results of statistical analyses, the effects of substituents on the above group frequencies were discussed.
Źródło:: World Scientific News; 2017, 74; 164-180
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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