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Q: Rank the following alkenes in order of increasing stability (least to most stable)
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Q: Expain the below Rule: The diene can react only when it adopts the s-cis conformation.
A: The diene can react only when it adopts the s-cis conformation.
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- If the elimination reaction can result in the formation of two different alkenes which one with predominate in the product?For each of the following, state whether the two structurel formulae show represent constitutional isomers or same compounds or different compounds.Although benzene is normally written with three double bonds, benzene is not reactive towards many reagents that alkenes normally react with. This lack of reactivity can be explained by the unusual stability created by cyclic conjugation. First, (i) describe at least one of the physical properties of benzene that demonstrates how the true structure of benzene does match the way the structure is normally written. Then, (ii) explain how the unusual stability of benzene can be demonstrated by its thermodynamic properties through some form of experiment. Be sure to (iii) include an appropriately labeled diagram as part of your answer (you do not have to quote any numerical values).
- Write chemical structures for compounds A through D in the following sequence of reac- tions. Compounds A and C are alcohols, one of which is cyclicHow many resonant structures can be written for each of the following aromatic hydrocarbons? (a) Anthracene, (b) Phenanthrene, (c) NaphthaceneWhich do you expect to be the more stable conformation of cis-1,3-dimethylcyclobutane, A or B? Why?
- Discuss and compare two possible chair conformations of cis-1,3-dibromocyclohexane compound. Which conformation is more stable? Why? Explain the reason clearly.How can alkenes and alkynes be classified: as nucleophiles, as electrophiles or depending on the reaction conditions could be both? Explain extensively.Which of the conformations has a lower energy?