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- 4. Foresee the resulting products from exciting the given molecule and determine which product is predominant.What other alkene is also formed along with Y in Sample Problem 9.3 (Attached) ? What alkenes would form from X if no carbocation rearrangement occurred?149) Why is a tertiary alcohol more reactive with hydrogen halides, than secondary alcohols? Because secondary alcohols are smaller and therefore less reactive for the attack of halide nucleophile. Because tertiary alcohols have more hydrogen atoms available for substitution reactions. Because a tertiary alcohol can form a more stable carbocation as an intermediate in the reaction. Only the 1st and the 2nd statements are acceptable.
- Cl₂ H₂O Draw the curved arrow step in this column... example: 1 H H OH CH3 CH3 + enantiomer CI: this mechanism requires. three mechanistic steps And complete sentence in this column In this mechanistic step, the nucleophilic alkene is attacking the chlorine which can be slightly electrophilic due to Cl₂'s polarizability, however, the extra lone pair on chlorine can attack one of the sp2 C resulting in the cationic complexreaction of this alkene to the different reagents written above and below the arrows3) Explain how and why the reaction below results in the observed regiochemistryand/or stereochemistry.
- 3. The haloalkane below is heated in a solution of ethanol and undergoes SN1 and E1S a) Draw the first step of the mechanism of the reaction. b) Show all the more stable carbocations that could be formed from (a). c) Draw all the El products that can be formed from (b). d) Circle the most favorable product(s) and explain your reasoning. e) Name: the most favored product(s).(Note: for cyclic alkenes the carbons of the C-C must be numbered 1,2 and in the name there is no need to specify its position). BrConsider the following reaction being performed with a low concentration. Think about what type of substitution mechanism will be favored, SN2 or SN1, and what product will result.Please draw the possible resonance structures for the following carbocations. Please demonstrate the relative stability of each carbocation. (Ex. An allylic secondary carbocation is more stable than a primary carbotion.)
- H. Each of the following compounds can be synthesized from an eight- carbon alkene using ozonolysis followed by dimethyl sulfide. Match the following compounds with their appropriate alkene. v Choose... H. 4-octene H. 1-methylcycloheptene cyclooctene Choose...4. Which stereoisomer is the major product for the following reaction? Fill in the missing brackets with the key intermediate/transition state that leads to the preferred stereoisomer. Briefly explain (one sentence or bullet point) your selection. Br₂ key intermediate Br Br Br && or BrDraw major E2 ELIMINATION product. Hint: Review Chapter 10.3, the elimination can only occur if the leaving group (Cl, Br, I, OTS, etc) and beta-hydrogen atom (H) are in anti-periplanar conformation. Red bond - the location of a double bond in the final product and the direction of a Newman projection: CI ? ***** A Et Et Et B Et C Et Et D