Indian Journal of Chemistry, Tập 8

absorption acetic acid acetone acetylated alcohol amine anhydrous aqueous aromatic atom band benzene bromine carbon catalyst chalkone chelates Chem Chemical chloride chloroform chromatography cm-¹ colour colourless complexes compounds conc constant cooled copper(II coumarin crystallized from methanol curve decomposition Delhi Department of Chemistry dissolved distilled dried electron Elution ester ethanol EtOH experimental extracted with ether filtered formamide formation Found fraction gave heated hydrochloric acid hydrogen hydrolysis hydroxide hydroxyl Indian infrared inorg kc/s ketone kinetics ligand method methyl mole molecules needles nitrate NMR spectrum obtained OCH3 oxidation oxygen phenyl Phys picric acid plots potassium prepared presence protons pyridine R₁ reaction mixture reduced pressure refluxed requires residue revised manuscript received room temperature silica gel sodium solid soluble solution solvent spectra stirring structure studied sulphur synthesis Table tion values yellow yield