Journal of the Chemical Society

absorption acetic acid acetone alcohol alkyl Amax Amer aqueous atoms autoprotolysis azulene band benzene benzyl bond bromide Calc calculated carbon cation CH₂ Chem chloride chloroform chromatography cm.¹ colour complex compounds concentration conductivity crystallised crystals decomposition derivative dilute dissolved distilled doublet ester ethanol ether ethyl acetate evaporated experimental extracted filtered formation formed Found fraction frequencies gas-liquid chromatography gave guaiazulene H₂O heated hydrocarbon hydrogen chloride hydrogen sulphate hydrolysis hydroxide infrared iodide isobutene isolated isomer light petroleum lithium log ɛ measurements method methyl mixed m. p. mixture molar mole molecules nickel nitrate nitromethane obtained oxidation perchlorate phenol phosphate photo-oxide potassium precipitated prepared proton pyridine pyrolysis radicals rate constants reaction reflux requires residue salt sample showed maxima sodium sodium hydroxide solid soluble solution solvent spectra spectrum structure sulphuric acid Table temperature tetrahydrofuran toluene ultraviolet values yield