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.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

Benzylidene-5-ethyl-1; 3; 4-thiadiazole-2-amines; solvent-free synthesis; SiO2; H3PO4; IR spectra; NMR spectra; Hammett correlation

• Wydawca: Przedsiębiorstwo Wydawnictw Naukowych "DARWIN"
• Czasopismo: International Letters of Chemistry, Physics and Astronomy
• Rocznik: 2014
• Tom: Vol. 5
• Strony: 89--98
• Opis fizyczny: Bibliogr. 34 poz., tab., wz.

Twórcy

autor

Thirunarayanan G.

• Department of Chemistry, Annamalai University, Annamalainagar - 608002, India

Bibliografia

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