Q4. Identify the most stable alkyne in the following molecules: C Page< 2 > of 40 Q5. Use arrow-pushing mechanism for the following reactions. Identify if they are SN1/SN2; E1/E2 reactions: Na CN Br 1. DMSO tBuOK 2. CI tBuOH 3. Br CH3OH 4. CI 3 W E R Acetone/H₂O heat 96 5 6 prt sc home end insert F10 F11 & 8 9 Y U S D F G H 0 P

Select an appropriate synthetic route of the diol shown starting with 1,1,3,3-tetramethyl-2-ethylcyclohexane. OH ОН + enantiomer 1. Br2, hv; 2. KOtBu; 3. HBr, ROOR; 4. KOtBu; 5. Br₂; 6. xs NaNH2; 7. CH3Br; 8. H₂, Lindlar's catalyst; 9. RCO3H; 10. H3O+ O 1. Br2, hv; 2. KOtBu; 3. HBr, ROOR; 4. KOtBu; 5. Br₂; 6. xs NaNH2; 7. CH3Br; 8. H₂, Pt; 9. OsO4, NMO; 10. NaHSO3, H₂O 1. Br2, hv; 2. KOtBu; 3. HBr, ROOR; 4. KOtBu; 5. Br₂; 6. 1 equiv. NaNH2; 7. CH3Br; 8. H₂, Lindlar's catalyst; 9. OsO4; 10. H3O+ O 1. Br2, hv; 2. KOtBu; 3. HBr, ROOR; 4. KOtBu; 5. Br₂; 6. xs NaNH2; 7. CH3Br; 8. H₂, Lindlar's catalyst; 9. OsO4, NMO; 10. NaHSO3, H₂O O 1. Br2, hv; 2. KOtBu; 3. HBr, ROOR; 4. KOtBu; 5. Br₂; 6. xs NaNH2; 7. CH3Br; 8. H2, Pd; 9. RCO3H; 10. H3O+

D. HOw many aistinct terminal alIKynes exist with a molecular formuia of C5H8! c. How many distinct internal alkynes exist with a molecular formula of C6H10? 4. Which of the following has the lowest b.p? a. 3,3-dimethyl-1-butyne; b. 1-hexyne с. 2-heptyne; d. 3-hexyne; e. 1-decyne. 1 5. Will the reactions shown below go the direction as indicated? + CHOMaBr CH

Pls help ASAP on both.