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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. Cyclic ether

2. Less hindered carbon center; chiral inversion

3. Tertiary carbon center; racemic

4. Less substituted elimination; sterically hindered

5. Formation of salcohol from alkene

6. Attach tosyl group onto alcohol

7. Differ in fixed geometrical arrangement of atoms

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

9. 2 Sulfide linkages in place of aldehyde

10. R2C=N-OH

11. Ph-NH2

12. H2O2

13. Aldehyde / ketone synthesis

14. Oxirane ring opening

15. Tertiary carbocation formed; relieved by deprotonation

16. Forms carboxylic acid; releases N

17. CH2-

18. Benzaldehyde

19. Reduces Ar-CH3 to -COOH

20. Non-superimposable mirror image

21. Donate electrons to aromatic ring

22. Alcohol closes ring to form oxirane

23. R-SO3H

24. Nucleophile adds to ketone (forming alcohol)

25. Elimination to form alkene

26. Bound to same atom

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

28. Oxidize to -COOH

29. Can protect a ketone

30. Ch2I2 - Zn(Cu)

31. Differ in position of atoms

32. Reacts with alkene to form oxirane

33. Bound to adjacent atoms

34. More substituted elimination; more stable

35. Splits an ether into alkyl halides

36. Formation of ethoxide

37. Cis/trans Isomers

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

39. Thionyl chloride

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

41. Split an alkene into 2 carbonyls

42. Reduces ketone to alkane

43. Reduces one bond of benzene ring

44. 4-pi system + 2-pi system --> Ring formation

45. Differ in rotation about sigma bonds

46. Allylic Substitution

47. Cycloformation

48. Oxidize to -CHO

49. Replaces thioacetal/ketal with carbonyl

50. Highly reactive carbonyl