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Products of the Determination of the Iodine Value with Iodine Monobromide
Author(s) -
Imming Peter,
Germershaus Oliver
Publication year - 2002
Publication title -
archiv der pharmazie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.468
H-Index - 61
eISSN - 1521-4184
pISSN - 0365-6233
DOI - 10.1002/1521-4184(200212)335:9<449::aid-ardp449>3.0.co;2-6
Subject(s) - iodine , chemistry , adduct , iodide , iodine value , stearate , organic chemistry , medicinal chemistry , inorganic chemistry
The iodine value (iodine number) is an important analytical characteristic of fats and oils. Leading pharmacopeias determine it using iodine monobromide (Hanuš 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.