title: Synthesis and spectroscopic properties of new azo dyes derived from 3-ethylthio-5-cyanomethyl-4-phenyl-1,2,4-triazole.
abstract: New 1,2,4-triazole colorants were obtained, in high yields, by coupling 3-ethylthio-5-cyanomethyl-4-phenyl-1,2,4-triazole (1) with diazotized aniline derivatives 2, 4 and 6. The azo dyes prepared in this work may exist in three tautomeric forms. We found that the tautomerism is influenced mainly by the nature of substituent at the para position of the aniline coupling component. This tautomerisation was observed in the NMR spectra of the dyes. The dyes were characterized by IR, ¹H-NMR, ¹³C-NMR and MS spectroscopic techniques.
authors.affiliation: Department of Chemistry, Faculty of Science for Girls, King Abdulaziz University, Jeddah, P.O. Box 50918, Jeddah 21533, Saudi Arabia.
authors.forename: Mariam
authors.initials: M
authors.lastname: Al-Sheikh
authors.affiliation: Department of Chemistry, Faculty of Science for Girls, King Abdulaziz University, Jeddah, P.O. Box 50918, Jeddah 21533, Saudi Arabia.
authors.forename: Hanadi Y
authors.initials: HY
authors.lastname: Medrasi
authors.affiliation: Department of Chemistry, Faculty of Science, El-Minia University, El-Minia 61519, Egypt.
authors.forename: Kamal Usef
authors.initials: KU
authors.lastname: Sadek
authors.affiliation: Department of Chemistry, Faculty of Science for Girls, King Abdulaziz University, Jeddah, P.O. Box 50918, Jeddah 21533, Saudi Arabia. rmekh@yahoo.com.
authors.forename: Ramadan Ahmed
authors.initials: RA
authors.lastname: Mekheimer
mesh_terms: D001391:Azo Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D060326:Chemistry Techniques, Synthetic; D004396:Coloring Agents / Q000138:chemical synthesis / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D014230:Triazoles; C045575:1,2,4-triazole