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By reaction between o-hydroxyacetophenone and 2-thiophenecarbaldehyde, we synthesized 3-hydroxy-2-(2’thienyl)-4-oxo-4H-1-benzopyran (HTC) reagent. Tin(II)-HTC complex was synthesized as stoichiometry in 1:2 (stoichiometry ratio is determined by the job’s method of continuous variation and mole ratio method) in dry methanol. The complex was characterized by IR, NMR spectra. Further, properties of the complex were studied by UV-Visible spectroscopy, fluorescence spectra and thermal gravimetric analysis (TGA). Complex shows maximum absorbance at 432 nm over negligible absorption of HTC reagent at 432 nm. It is more fluorescent as compared to HTC reagent.

rasayan journal of chemistry/rasayan journal of chemistry

SYNTHESIS OF 3-HYDROXY-2-(2’-THIENYL)-4-OXO-4H-1- BENZOPYRAN (HTC) REAGENT AND SPECTRAL CHARACTERIZATION OF TIN(II)-3-HYDROXY-2-(2’- THIENYL)-4-OXO-4H-1-BENZOPYRAN (HTC) COMPLEX