The position of these structures is indicated by the superscript next to the delta symbol in the IUPAC notation for fatty acids.
The position of these structures is indicated by the superscript next to the delta symbol in the IUPAC notation for fatty acids. These structures cannot exist as the bridgehead of a ring system according to Bredt's rule. An additional ghost atom is needed to deal with these structures according to the Cahn-Ingold-Prelog rules, which can also specify their geometry by marking them (*) E or Z. Nine of these structures make up a conjugated system in the central ring of chlorophyll, causing its green color. These structures contain one sigma and one pi bond, occur between sp2-hybridized carbons, and can be labeled cis or trans depending on orientation. For 10 points, name this type of bond indicated by two parallel lines which characterize alkenes.
The position of these structures is indicated by the superscript next to the delta symbol in the IUPAC notation for fatty acids.
carbon-carbon double bond [prompt on alkenes before mention; prompt on pi bonds before mention]