Question

led by the base and loving ne relative geometry requirement of the H-atom being a what is the E2 reaction? group in the E2 General Example: A) gauche B) anti-coplanar C) syn-coplanar D) eclipsed-coplanar KR 25. Which of the carbocations can undergo a 1.2-methyl shift to form a more stable carbocation Como C) 1,3 D) 1,4 A) 2, 3 B) 2,4 26. For the stereospecific reactions below, choose which compound represents the final product: H2(g) Product | Cats Н,0 2-butyne- Lindlar Catalyst (Pd, CaCO3 quinoline, lead acetate) нсн. COM MGCH H CH.CH BCH 27. Which of the following reagents undergoes a SYN addition to an alkene? A) 85% H,PO., heat B) Hz (a) & palladium catalyst C) NaN, & acelone D) Cl and CH OH

Answer 1

Solution: 24) The relative geometry requirement of the H-atom being abstracted by the base and leaving group in the Ex- reaction is – Q. anti-coplanar. RR Hence, eption B is correct Anti-periplanar. 3 25) The carbocation can undergo a 12-methyl shift to form a more stable Colocation de Hence, option is correct. 26) 2-butyne ind for catalyst Product 2-butyne 2018) A 24 HO - Hall (Pd, cacoz y un by a quinoline, Leadacetate) Hence, option is correct 27) The geagent undergoes a SYN - addition to an alkene is – 428) & Lindlar catalyst Hence, option & is correct,