CHEM 140B Chapter Notes - Chapter 11: Sigma Bond, Orbital Hybridisation, Nuclear Magnetic Resonance

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Ochem textbook notes chapter 11: alkenes: infrared spectroscopy and mass spectrometry. General form: cnh2n: rule 1: name stem by finding longest chain that includes both carbons making up the double bond, rule 2: number carbons starting at end closer to double bond. 1-alkene: terminal alkene; the rest are internal. Same molecular formula but different double location: constitutional isomers/double-bond isomers: rule 3: add substituents and their positions as prefixes, rule 4: identify stereoisomers (cis vs. trans) 2 alkenes only differing in stereochemistry: geometric/cis-trans isomers. Name with e, z system: if 2 groups of high priority are on opposite sides, e configuration. If 2 groups of high priority are on the same side, z isomer: rule 6: hydroxy functional group takes precedence over double bond. Alcohols with double bonds are alkenols; carbon with oh group is lowest number. 11. 2 structure and bonding in ethene: the pi bond.