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GRE Chemistry Organic

Subjects : gre, science, chemistry
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Splits an ether into alkyl halides

2. Uses Hg(OAc)2 + R'OH; forms ether from alkene

3. Aldehyde / ketone synthesis

4. 2 Sulfide linkages in place of aldehyde

5. Differ in position of atoms

6. OCH3

7. Reacts with alkene to form oxirane

8. Differ in fixed geometrical arrangement of atoms

9. Cis/trans Isomers

10. Tertiary carbon center; racemic

11. Cycloformation

12. Less substituted elimination; sterically hindered

13. Benzaldehyde

14. Non-superimposable mirror image

15. Thionyl chloride

16. Can protect a ketone

17. H2O2

18. Reduces ketone to alkane

19. Less hindered carbon center; chiral inversion

20. Anti-alignment required

21. Bound to adjacent atoms

22. Replaces thioacetal/ketal with carbonyl

23. R-SO3H

24. Differ in rotation about sigma bonds

25. Formation of ethoxide

26. Allylic Substitution

27. CH2-

28. R-NH2 + NaNO2/HCl --> R-N=N+ Cl-

29. Split an alkene into 2 carbonyls

30. Alcohol closes ring to form oxirane

31. R2C=N-OH

32. Cyclic ether

33. Nucleophile adds to ketone (forming alcohol)

34. Tertiary carbocation formed; relieved by deprotonation

35. Bound to same atom

36. Ph-NH2

37. Reduces Ar-CH3 to -COOH

38. 4-pi system + 2-pi system --> Ring formation

39. Oxirane ring opening

40. Oxidize to -CHO

41. Chiral - with superimposable mirror image

42. One carbon away from aryl group can be reduced with Pd / H2

43. Attach tosyl group onto alcohol

44. More substituted elimination; more stable

45. Best with electron withdrawing group ortho/para to substitution site

46. Forms carboxylic acid; releases N

47. Ch2I2 - Zn(Cu)

48. Oxidize to -COOH

49. Formation of salcohol from alkene

50. Highly reactive carbonyl