Quarterly Journal of the Chemical Society of London

absorption acetic acid acetone added alcohol alumina Amer amine aqueous aromatic ation atom band benzene boron bromide bromine butene butenolide Calc calculated carbonyl catalyst CH₂ Chem chloride chloroform chlorohydrin chromatography cm.¹ complex 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 heated hexane hydrolysis hydroxide infrared infrared spectra iodide isolated isomer isomerisation isoxazole ketone ligand localised lophine method methylene mixture molar mole molecular molecule mµ ɛ n.m.r. spectrum needles nitrogen observed obtained orbitals oxidation peak phenyl piperidine polymer potassium prepared pressure proton pyridine reaction reactivity reflux requires residue resonance ring room temperature showed sodium hydrogen carbonate solid solution solvent structure substitution Table ultraviolet values washed yield