- Tytuł:
- Solvent-free synthesis and assessment of substituent effects from IR & NMR spectra of some substituted benzylidene-5-ethyl-1,3,4-thiadiazole-2-amines
- Autorzy:
- Thirunarayanan, G.
- Powiązania:
- https://bibliotekanauki.pl/articles/411670.pdf
- Data publikacji:
- 2014
- Wydawca:
- Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
- Tematy:
-
Benzylidene-5-ethyl-1
3
4-thiadiazole-2-amines
solvent-free synthesis
SiO2
H3PO4
IR spectra
NMR spectra
Hammett correlation - Opis:
- A series containing ten titled compounds were synthesized by SiO2:H3PO4 catalyzed solvent-free condensation of substituted benzaldehydes and 2-amino-5-ethyl-1,3,4-thiadiazole under microwave irradiation. The yields of prepared amines are more than 90 %. The synthesized amines were characterized by their physical constants and spectroscopic data reported in literature earlier for known compounds. The assigned spectral group frequencies such as infrared νC=N, C-S-C, N-N (cm-1) and NMR chemical shifts (δ, ppm) of CH, C=N have been 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 substituent on the above spectral data have been discussed.
- Źródło:
-
International Letters of Chemistry, Physics and Astronomy; 2014, 5; 89-98
2299-3843 - Pojawia się w:
- International Letters of Chemistry, Physics and Astronomy
- Dostawca treści:
- Biblioteka Nauki
Artykuł