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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. Bound to same atom

2. Bound to adjacent atoms

3. Non-superimposable mirror image

4. Ch2I2 - Zn(Cu)

5. Donate electrons to aromatic ring

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

7. Alcohol closes ring to form oxirane

8. Split an alkene into 2 carbonyls

9. R-SO3H

10. Differ in fixed geometrical arrangement of atoms

11. Can protect a ketone

12. Formation of ethoxide

13. R2C=N-OH

14. 2 Sulfide linkages in place of aldehyde

15. Thionyl chloride

16. Highly reactive carbonyl

17. Tertiary carbocation formed; relieved by deprotonation

18. H2O2

19. Reduces Ar-CH3 to -COOH

20. Allylic Substitution

21. Splits an ether into alkyl halides

22. Elimination to form alkene

23. Tertiary carbon center; racemic

24. CH2-

25. Cis/trans Isomers

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

27. Oxidize to -CHO

28. Reacts with alkene to form oxirane

29. Cyclic ether

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

31. Forms carboxylic acid; releases N

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

33. Reduces ketone to alkane

34. 4-pi system + 2-pi system --> Ring formation

35. Anti-alignment required

36. Ph-NH2

37. Replaces thioacetal/ketal with carbonyl

38. Differ in rotation about sigma bonds

39. Less hindered carbon center; chiral inversion

40. Formation of salcohol from alkene

41. OCH3

42. Chiral - with superimposable mirror image

43. Oxirane ring opening

44. Less substituted elimination; sterically hindered

45. Differ in position of atoms

46. Cycloformation

47. Oxidize to -COOH

48. Reduces one bond of benzene ring

49. More substituted elimination; more stable

50. Aldehyde / ketone synthesis