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Unformatted text preview: Cis double bonds more stable than trans when ring is smaller than 11-membered Question 5.33 Chapter 6 Addition reactions-E+ added to C with most hydrogens and X- to C with least-Addition of Radicals Alkene + water and H+ alcohol Alkene + HCl alkane with Cl H2SO4 and H3PO4 are weaker nucleophiles than H2O Reactions forming dihalides-alkene + Cl2 + polar solvent trans alkane Reactions of halides and H2O to form halohydrins-alkene + Br2 + water alcohol with Br group-Br adds first-H2O takes opposite side (trans) because Br takes up so much space Hydroboration – Oxidation-2 step addition anti-markovnikov-BH3 (electrophile)-alkene + BH3 + peroxide and OH- alcohol Epoxides -3 membered rings in a chain containing 2 C and 1 O Isomers-Constitutional: Functional / Positional-Stereoisomers: conformational / Geometric-Optical Isomers Markovnikov and Zaitsef’s rule all aim to form the more stable intermediate to predict trans and cis addition products...
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- Fall '07
- Organic chemistry, carbocation -non-nucleophilic ions, der Waals strain, -a carbon group