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GRE Chemistry Organic

Subjects : gre, science, chemistry
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1. 2 Sulfide linkages in place of aldehyde

2. Reduces Ar-CH3 to -COOH

3. Reduces one bond of benzene ring

4. Bound to same atom

5. Differ in fixed geometrical arrangement of atoms

6. Non-superimposable mirror image

7. Bound to adjacent atoms

8. Ch2I2 - Zn(Cu)

9. R2C=N-OH

10. Splits an ether into alkyl halides

11. Cyclic ether

12. Formation of ethoxide

13. Forms carboxylic acid; releases N

14. Anti-alignment required

15. Less substituted elimination; sterically hindered

16. Split an alkene into 2 carbonyls

17. Aldehyde / ketone synthesis

18. Tertiary carbocation formed; relieved by deprotonation

19. Thionyl chloride

20. 4-pi system + 2-pi system --> Ring formation

21. Less hindered carbon center; chiral inversion

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

23. Oxirane ring opening

24. Nucleophile adds to ketone (forming alcohol)

25. Alcohol closes ring to form oxirane

26. OCH3

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

28. CH2-

29. Can protect a ketone

30. Reduces ketone to alkane

31. Attach tosyl group onto alcohol

32. Chiral - with superimposable mirror image

33. Tertiary carbon center; racemic

34. Differ in rotation about sigma bonds

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

36. Highly reactive carbonyl

37. Reacts with alkene to form oxirane

38. Cis/trans Isomers

39. Oxidize to -CHO

40. Cycloformation

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

42. R-SO3H

43. Elimination to form alkene

44. H2O2

45. Formation of salcohol from alkene

46. Ph-NH2

47. Replaces thioacetal/ketal with carbonyl

48. Allylic Substitution

49. More substituted elimination; more stable

50. Benzaldehyde