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- Explain the role strain plays on stability and reactivity of a cyclic alkane such as cyclopropane.draw structures for all the isolated, conjugated, and cumulated dienes of molecular formula C5H8.The bicyclic alkene P can be prepared by thermal electrocyclic ringclosure from cyclodecadiene Q or by photochemical electrocyclic ringclosure from cyclodecadiene R. Draw the structures of Q and R, andindicate the stereochemistry of the process by which each reactionoccurs.
- Generally, addition of halogen acids to alkene follows Markovnikov rule. In which condition the anti-Markovnikov rule is followed? Describe the mechanism with an example.Dehydrohalogenation of 1-chloro-1-methylcyclopropane affords two alkenes (A and B) as products. Explain why A is the major product despite the fact that it contains the less substituted double bond.Which alkene product would you expect to be the major product under kinetic conditions? Under thermodynamic conditions? The given pictures are the reactions in which we have to determine which alkene product we expect would be the major product under kinetic and thermodynamic conditions.
- Consider this scheme. Why does a ring form with a single ethylene glycol on A rather than two molecules of ethylene glycol to form acyclic acetals? Intramolecular reactions are A unfavorable when compared to intermolecular reactions Acyclic molecules are unfavorable compared to rings В in all cases The change in entropy is favorable for ring formation and strain is low in a five- membered ring Sterics prevents acyclic molecules from forming in this D case H HCI + HOCH2CH2OH H + H2ODraw the alkene that would react with the reagent given to account for the product formed. ? + + H₂O **** H₂S04 • 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. CH3 CH3 CHCCH3 | | OH CH3 +1Draw the alkene that would react with the reagent given to account for the product formed. ? + H₂O H₂SO4 CH3 CH3 CHCCH3 OH CH3 • 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. Sn [F ChemDoodle
- Chlordane, like DDT, is an alkyl halide that was used as an insecticide for crops such as corn and citrus and for lawns. In 1983, it was banned for all uses except against termites, and in 1988, it was banned for use against termites as well. Chlordane can be synthesized from two reactants in one step. One of the reactants is hexachlorocyclopentadiene. What is the other reactant?Draw the alkene that would react with the reagent given to account for the product formed. ? + H₂O H₂SO4 CH3 CH3CCH3 OH 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. Sn [F ChemDoodleⓇBicyclohexadiene, also known as Dewar benzene, is extremely stable despite the fact that its rearrangement to benzene is energetically favored. Explain why the rearrangement is so slow.