Archiv der Pharmazie (Weinheim) 2002-11-01

Products of the determination of the iodine value with iodine monobromide.

Peter Imming, Oliver Germershaus

Index: Arch. Pharm. (Weinheim) 335(9) , 449-51, (2002)

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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.

Related Compounds

  • Iodine monobromide

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