Organic Reaction Mechanisms - Question Bank
1. The intermediate formed in the addition of HBr to propene without peroxide is a:
2. What is the term for a reaction that involves cyclic movement of electrons?
3. Which mechanism describes the reaction of an alkene with a peroxy acid to form an epoxide?
4. What is the correct order of leaving group ability from best to worst?
5. In electrophilic addition to conjugated dienes, which product is favored under kinetic control?
6. Which of the following is NOT a characteristic of SN2 reactions?
7. What is the term for a reaction that proceeds in a sequence of elementary steps?
8. Which species acts as a Lewis base in the reaction of BF3 with NH3?
9. The addition of a halogen to an alkene typically proceeds via:
10. What is the role of a leaving group in nucleophilic substitution reactions?
11. Which reaction mechanism is favored by polar protic solvents in alkyl halide reactions?
12. What type of intermediate is formed in the reaction of an alkyne with H2O in the presence of H2SO4 and HgSO4?
13. The Zaitsev's rule predicts the formation of:
14. Which of the following is a common example of an electrophile in organic chemistry?
15. What is the term for a reaction where bonds are broken and formed in a single step?
16. In an SN2 reaction, aprotic solvents generally:
17. Which type of reaction mechanism is typically involved when a strong nucleophile attacks a carbonyl carbon?
18. What is the intermediate formed in the free radical halogenation of alkanes?
19. The stability of carbanions generally follows the order:
20. Which reaction involves the addition of HX to an alkene, where X is a halogen?
21. What is the term for a species that readily donates a pair of electrons?
22. In electrophilic aromatic substitution, activating groups:
23. The reaction of an alkyl halide with a strong base to form an alkene proceeds via which mechanism?
24. What is the key characteristic of a concerted reaction?
25. Which of the following is an example of a Lewis acid?
26. The rate-determining step in an SN1 reaction is the:
27. What is the name of the species formed when a proton is removed from a carbon atom adjacent to a double bond?
28. Which type of mechanism is characteristic of the reaction of an alkene with H2O in the presence of an acid catalyst?
29. What is the product of the reaction between a Grignard reagent and an aldehyde?
30. The stability of carbocations follows the order:
31. Which reaction mechanism involves a two-step process with an intermediate carbocation?
32. What is the correct term for a molecule or ion that can accept an electron pair?
33. In a concerted reaction mechanism, bond breaking and bond formation occur:
34. Which of the following is an example of a nucleophile?
35. What is the typical intermediate in a free radical chain reaction?
36. The regioselectivity of electrophilic addition to unsymmetrical alkenes is explained by which rule?
37. What type of reaction is the addition of Br2 to ethene?
38. Which statement accurately describes a nucleophile?
39. What is the primary driving force for E2 elimination reactions?
40. Which mechanism involves the formation of a sigma complex (arenium ion)?
41. The rearrangement of carbocations is a common feature of which reaction type?
42. What is the term for a species that donates an electron pair to form a covalent bond?
43. Which of the following is a common electrophile in organic chemistry?
44. In electrophilic aromatic substitution, what is the electrophile typically derived from?
45. What is the intermediate formed in an SN1 reaction?
46. The concerted, one-step mechanism is characteristic of which type of reaction?
47. Which species is characterized by having an unpaired electron?
48. What is the role of a catalyst in an organic reaction?
49. In SN2 reactions, what is the order of reactivity of primary, secondary, and tertiary alkyl halides?
50. Which type of reaction involves the movement of a pair of electrons from a nucleophile to an electrophile?