title: Products of the determination of the iodine value with iodine monobromide.
abstract: The iodine value (iodine number) is an important analytical characteristic of fats and oils. Leading pharmacopeias determine it using iodine monobromide (Hanus method). We used methyl oleate as a simple analog of unsaturated triacylglycerols to identify the products. After performing the reaction in deuterated solvents under pharmacopeial conditions, NMR spectroscopy revealed the presence of the 9, 10-diiodo, 9, 10-dibromo, and 9, 10-bromoiodo adducts, leaving no educt olefin. The prescribed subsequent addition of potassium iodide led to the formation of methyl 9, 10-diiodo and bromoiodo stearate in equal amounts.
authors.affiliation: Institut für Pharmazeutische Chemie, Philipps-Universität, Marburg, Germany. imming@mailer.uni-marburg.de
authors.forename: Peter
authors.initials: P
authors.lastname: Imming
authors.forename: Oliver
authors.initials: O
authors.lastname: Germershaus
mesh_terms: D001965:Bromides / Q000737:chemistry*; D005224:Fats, Unsaturated / Q000737:chemistry; D007454:Iodides / Q000737:chemistry*; D007455:Iodine / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D009829:Oleic Acids / Q000737:chemistry*; D010602:Pharmacopoeias as Topic / Q000592:standards*; D014280:Triglycerides / Q000737:chemistry
chemical_list: D001965:Bromides; D005224:Fats, Unsaturated; D007454:Iodides; D009829:Oleic Acids; D014280:Triglycerides; C005576:methyl oleate; D007455:Iodine; C054509:iodobromine