Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: 1112 on March 25, 2009, 12:58:42 AM
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I am reading a book on total synthesis. I do not know what a type of notation used for unsaturated bonds means. The notation is :delta:(triangle)1,2. I picked 1,2 arbitrarily. Here is an example from the book:
"Saturation of the electron-deficient :delta:14,15 double bond in 30 with hydrogen in the presence of palladium on charcoal provides, as the major product, cis ester 31 and a small amount of the isomeric trans ester."
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Can you draw that compound 30 that is in the book? I would imagine that means the bond between C14 and 15, but I can't say I've seen it before.
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yes, it's a double bond between those carbons (starting from the carboxylic acid). This is common in fatty acids.
http://en.wikipedia.org/wiki/Fatty_acid#Nomenclature