Systems - the double bonds, counting from the carboxyl...

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Systems: IUPAC IUPAC names follow the nomenclature conventions of the International Union of Pure and Applied Chemistry. These names describe the structures in detail (if one knows the conventions), but tend to be unwieldy. In the IUPAC system, the carboxyl carbon is denotes by the number one, and positions in the chain are denoted with reference to it. E.g. a double bond is said to be at the 9- carbon if it originates at the ninth carbon, and extends to the next (tenth) carbon in the chain. Systems: Two Abbreviation Systems After the common names, these are the most frequently used to denote complicated structures. The carboxyl-reference system indicates the number of carbons, the number of double bonds, and the positions of
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Unformatted text preview: the double bonds, counting from the carboxyl carbon (which is numbered 1, as in the IUPAC system). It differs from the IUPAC system in that it uses a number ( e.g., 16) to denote chain length instead of a name derived from Greek ( e.g., hexadecanoic acid). The omega-reference system indicates the number of carbons, the number of double bonds and the position of the double bond closest to the omega carbon, counting from the omega carbon (which is numbered 1 for this purpose). This system is useful in physiological considerations because of the important physiological differences between omega - 3 and omega - 6 fatty acids, and the impossibility to interconvert them in the human body....
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This document was uploaded on 11/03/2011 for the course BIOLOGY BSC1105 at Broward College.

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