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absorption acetic acid activity alcohol amine Analysis anhydride aqueous aromatic atom band benzaldehyde benzene Cairo University Calcd calculated catalyst Chem Chemical Chemistry chloride chloroacetone clay colourless crystals complexes compounds concentration condensation constant corresponding crystallised curves derivatives dioxane Egypt El-Naggar electron equation ester ethanol ether Experimental extraction filtered formation Formula Found gave give hydrazine hydrate hydrochloride hydrogen hydrolysis hydroxide Inorg investigation ketones kinetic ligand metal method methyl mole molecular molecule National Research Centre nitrobenzene nitrogen obtained oxidation percent phenyl phthalide potassium present protein protons pyrazoles pyridine ratio react reaction mixture reagents recrystallized refluxed Results and Discussion revised form room temperature salicylanilides salt sample Schiff bases showed silicic acid silicon sodium sodium acetate solution solvent species spectrum structure substituents Synthesis tion titration values xanthen yield zero zero zero