Journal of the Chemical Society

absorption acetic acid acetone added alcohol alumina Amer amine aqueous aromatic atom band benzene boron boron trichloride bromide butene butenolide Calc calculated carbonyl catalyst cation CH₂ Chem chloride chloroform chromatography cm.¹ CO₂Me complexes compounds concentration conjugated constants crystallised crystals delocalisation diluted dimethyl dimethylformamide dioxan distilled diyne dried electron eluted energy equilibrium ester ethanol ethyl acetate evaporated experimental extracted with ether Figure formation formed Found fraction frequency gave gibberellin give halides heated hexane hydrochloric hydrolysis hydroxide infrared infrared spectra iodide isomer isomerisation isoxazole ketone ligand light petroleum lophine method mixture molar mole molecular molecule needles nitrogen obtained orbitals oxidation peak petroleum b. p. phenyl piperidine polymers potassium prepared pressure proton pyridine reaction reflux requires residue resonance ring room temperature sodium hydrogen carbonate solid solution solvent spectrum structure Table ultraviolet values washed yield