Draw 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
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- 3) Explain how and why the reaction below results in the observed regiochemistryand/or stereochemistry.Draw 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: Br ? A B C D7) Assign partial charges on the Cl-Cl (polarized) below. This reaction proceeds through a three-membered ring halonium intermediate. The first step involves arrows similar to the carbene reaction above plus an additional arrow showing the Cl-Cl bond breaking. The second step is SN2 at the more substituted carbon. 8) Complete the following reaction by adding curved arrows, intermediates, and the expected products. St r :CI-CI: :CI: 9) Label the Mechanistic steps above and the halonium ion intermediate. Because the second step is similar to SN2 the halides add anti to each other.
- In the E2 reaction of 2-bromopentane with sodium tert-butoxide, 1-pentene is favored over 2- pentene. It is based on O the size of base used. O the Zaisev's rule. O the strength of the base used. O the Hoffman product. O the stability of alkeneAcyl transfer (nucleophilic substitution at carbonyl) reactions proceed in two stages via a "tetrahedral intermediate." Draw the tetrahedral intermediate as it is first formed in the following reaction. H3C HCI / H2O `NH2 reflux • You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • Do not include counter-ions, e.g., Na", I, in your answer. • In cases where there is more than one answer, just draw one. opy aste Previous NextWhich rearrangement would the two example of carbocation below most likely undergo? a. Methyl shiftb. Hydride shiftc. Paradigm shiftd. Equilibrium shift
- Acyl transfer (nucleophilic substitution at carbonyl) reactions proceed in two stages via a "tetrahedral intermediate." Draw the tetrahedral intermediate as it is first formed in the following reaction. H3C. ... NH2 HCI/H₂O reflux • You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • Do not include counter-ions, e.g., Na+, I, in your answer. • In cases where there is more than one answer, just draw one. + 4 n [ ?ochem help please Predict the major product(s) for the following reaction sequences and provide the stepwise mechanism for both steps 1 and 2 .... (see attached image)Draw 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: ? A H B C In en H H D H
- 1. For the reaction in Fig. 9 draw the curved arrows and the structure of the transition state. H to Figure 9: Draw curved arrows and the structure of TS H₂O محمد OO-HThe carbocation intermediate formed in the first step is resonance-stabilized. Draw the other resonance structure (by modifying the provided drawing) and add curved arrow(s) to convert the first resonance structure into the second one. Use the +/- tools to add/remove charges, and use the single bond tool to interconvert between double and single bonds. ÇH3 CH3 H3C. H,C. CH3 CH3 ČH3 ČH3 ČH3 ČH3 Edit Drawing6) Complete the following mechanism. (D and SN2) H Br. NaH "H: " 7) Complete the following mechanism. (D and SN2) H NaH "H: " Br. SN2 Good Nucleophile SN2 ether THF