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Draw mechanism arrows and then predict the major products and stereochemistry. Also include the labels of
1-methylcyclohexene with BH3 followed later with –OH, H2O2, and H2O.
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- Draw an approximate reaction-energy diagram showing the curves for the two possible pathways for ionic addition of HBr to 1-methylcyclohexene. (a) Formation of the major product, 1-bromo-1-methylcyclohexane, and (b) formation of the minor product, 1-bromo-2-methylcyclohexane. Point out how these curves show that 1-bromo-1-methylcyclohexane should be formed fasterIdentify two alkenes that react with HBr to form 1-bromo-1-methylcyclohexane without undergoing a carbocation rearrangement.Name (including E/Z stereochemistry) the five alkenes that can produce 3-bromo-3-methylhexane on reaction with HBr. Draw the skeletal structure of each molecule.
- An alkene having the molecular formula C11H20 is treated sequentially with ozone (O3) and zinc/acetic acid to give the product/s shown. CH;CH2ČCH,CH3 Draw a structural formula for the alkene. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. In cases where there is more than one answer, just draw one. C opy aste ChemDoodleTReview TOpics] [References Draw a structural formula for the major product of the reaction shown. CH3 CH3CHCH=CH2 Show product steréochemistry IF the reactant alkene has both carbons of the double bond within a • Do not show stereochemistry in other cases. If the reaction produces a racemic mixture, just draw one stereoisomer. C P opy aste C.Indicate the products of the reaction with their name and stereochemistry: Å CH₂ CH3 C6H5 H₂O, H+
- On standing, 1,3-cyclopentadiene is transformed into a new compound called dicyclopenta- diene, having the molecular formula C10H12. Draw the mechanism of the reaction that forms the product. Use dashed lines to indicate bond formation and curves arrows to show bond movement.Nonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium with their conjugated , -unsaturated isomers. Propose a mechanism for this isomerization.Draw the bond-line (skeletal) structure of the compound with molecular formula C₂H₁3Br that gives the following alkene as the exclusive product of E2 elimination. Click and drag to start drawing a structure. C X C Ś c+
- When the alkene A was treated first with Hg(OAc)2 in MeOH and second with NaBH4 the product was the ether B. Using curved arrows please give the mechanism for the first step of (Hg(OAc)2 in MeOH) this reaction, including any regioselectivity or stereoselectivity. H3C 1. Hg(OAc)2, MeOH H3C O-CH3 =CH2 ✓ -CH3 H3C 2. NaBH H3C A BReaction of HBr with 3-methylcyclohexene yields a mixture of four products: cis-and trans-1-bromo-3-methylcyclohexane and cis-and trans-1-bromo-2-methylcyclohexane. The analogous reaction of HBr with 3-bromocyclohexene yields trans-1, 2-dibromocyclohexane as the soleproduct. Draw structures of the possible intermediates, and then explain why only a single product is formed in this reaction.What reagents are needed to convert 1-ethylcyclohexene into (a) 1-bromo-2ethylcyclohexane; (b) 1-bromo-1-ethylcyclohexane; (c) 1,2-dibromo-1-ethylcyclohexane?