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01 mole 5-arylidene rhodanine absorption bands acetic acid activity alcohol aldehydes amine Analysis analytical data anhydride aqueous aromatic benzene bromide Cairo Univ Calcd capric acid carbon carbonyl catalyst Chem chemical Chemistry chloride colour complexes compounds concentration condensation cooled copper crystallized deoxymercuration derivatives dioxan Egypt electrode ester ethanol ether ethylene Experimental extraction filtered formation Found gave give the corresponding Grignard reagents heated under reflux hydrazine hydrate hydrochloric acid hydrogen I.R. spectra infrared Interaction investigation ketone ligand Melting points metal ions method methyl molecules National Research Centre obtained phenyl piperidine potassium hydroxide potential prepared presence protons pyridine rate constant reacted reaction mixture reaction temperature reagents recrystallized reflux respectively revised form rhodanine room temperature showed sodium acetate sodium hydroxide solid solution solvent solvent to give spectrophotometer spectrum structure Synthesis values vanadium yield