Examine each reaction. Determine the mechanism (E1, E2, SN1, or SN2) for each reaction. SN1 E2 E1 SN2 CH2CH3 CH2CH3 CH2CH3 A. Br major product Br DBU В. OOCH,CH, C. Br oc(CH3)3 D.

What mechanism did the reaction undergo? CI CH CHa CHa CH,CO,H Select one: a. E2 b. E1 c. SN2 8d. SN1

HO .OH cat. H2SO4 H₂O cat. H2SO4 Complete both mechanisms above. BRIEFLY explain how the different reaction conditions (in the presence of acid) result in different products being formed. How does equilibrium play a role?

Can you provide a full reaction mechanism for this reaction?  Bn is benzyl azide.

3. Identify the products (A-G) of each reaction sequence shown below OH 1) HCI 2) KCN E Br NaOCH 3, CH3OH 1) PCC 2) CH3MgCl 3) H3O+ 4) CrO3, H₂SO4, H₂O 1) LDA, THF, -78 °C 2) CH31 A (C7H12O) C (C4H8O) F (C5H₂N) 1) Br₂, H* (cat.) 2) Li₂CO3, LiBr, DMF 1) LDA, THF, -78 °C 2) CH3CH₂CI 1) LDA, THF, -78 °C 2) CH3CH₂Br ¹H NMR: 6 6.7 (t, 1H); 2.4 (t, 2H); 2.3 (q, 2H);| 2.1 (s, 3H); 1.9 (quint., 2H) 13C NMR: 8 198; 144; 142; 36; 33; 27; 23. D B ¹H NMR: 8 2.5 (q, 2H); 2.4 (t, 2H); 1.6 (sextet, 2H); 1.1 (t, 3H); 0.90 (t, 3H) 13C NMR: 8 210; 45; 36; 18; 14; 8. G (C7H13N)

2. Draw the mechanism of the reaction below. Make sure your mechanism is consistent with the reaction conditions. - Br OH H HO [-H₂O] " cat. H-A Br

10. Provide the product and mechanism for the following reactions. HBr NaOH H20 1. NaNH2 `H 2. Br 1. Br2 2. H20 Br NaCN acetone

Which of the following are intermediates in the mechanism for the reaction shown? (product intentionally not shown) Br I. I. only II. only II. and III. I. and III. Br₂ CH3SH II. Br H III.

For each step in the reaction show the mechanisms. Each reactiond has at least one intermediate

Consider the following diagram. Is the transition state correct? Br D "H tBuOK tBuOH Select the best answer fro the list below. tBuO Br THI No. This is not an E2 reaction. This is an SN2 reaction. No. The bromine should not be in the axial position. yes it is correct. No. The H and D need to be switched. P