Study Union: CHM 2210 Final Exam Review 1. The following ... · Final Exam: 5/03 4-6:50 PM Study Union: CHM 2210 Final Exam Review 1. The following molecules are related in what manner?

Final Exam: 5/03 4-6:50 PM

Study Union: CHM 2210 Final Exam Review

1. The following molecules are related in what manner?

A) They are isotopes

B) They are constitutional isomers

C) They are the same structure

D) They are composed of different elements

E) There is no relationship

3. Considering atoms with no formal charge, which statement best describes the

valence of carbon, nitrogen, and oxygen?

A) Carbon: two bonds, zero lone pairs; nitrogen: three bonds, two lone pairs

B) Oxygen: two bonds, two lone pairs; nitrogen: three bonds, one lone pair

C) Carbon: three bonds, one lone pair; oxygen: two bonds, two lone pairs

D) Carbon: four bonds, zero lone pairs; nitrogen: two bonds, two lone pairs

E) Oxygen: three bonds, one lone pair; nitrogen: two bonds, two lone pairs

4. In which of the following does the central atom have 2 pairs of non–bonding

electrons?

A) O3

B) CO2

C) CO3 2–

D) NH4+

E) H2S

5. In ammonium, nitrogen has a valence of 4, and zero nonbonding electrons. What is

the correct formal charge of nitrogen with 4 covalent bonds?

A) –2

B) –1

C) 0

D) +1

E) +2

6. In which structure(s) below does the oxygen have a formal charge of +1?


A) I only

B) II only

C) I and III

D) I and IV

E) I, III, and IV

7. Identify the hybridized orbitals involved in formation of the C–N sigma () bond in

the following molecule known as an oxime:

A) (sp2, sp2)

B) (sp3, sp3)

C) (sp, sp)

D) (sp2, sp3)

E) There is no sigma bond between C–N.

8. From left to right, indicate the hybridization of the indicated atoms in the following

molecule:

A) I – sp ; II – sp2 ; III – sp3 ; IV – sp2

B) I – sp2 ; II – sp ; III – sp2 ; IV – sp3

C) I – sp3 ; II – sp2 ; III – sp ; IV – sp2

D) I – sp2 ; II – sp3 ; III – sp2 ; IV – sp

E) I – sp2 ; II – sp2 ; III – sp2 ; IV – sp3

9. The carbon and oxygen atoms in carbon monoxide (CO) are connected by which

type of bond(s)?

A) A sigma () bond

B) Two sigma () bonds

C) A pi () bond

D) Two pi () bonds


E) Both A and D

10. What is the approximate bond angle around the carbon in formaldehyde, a

molecule with the formula H2CO?

A) 60°

B) 90°

C) 109.5°

D) 120°

E) 180°

11. In the following reaction, how many H’s do you add or lose?

A. Add 1

B. Add 2

C. Lose 1

D. No change

12. In the following reaction, how many H’s do you add or lose?

A. Add 1

B. Add 2

C. Lose 1

D. No change

13. Which of the following structures contains an aromatic ring?

A. 1 B. 2 C. 3 D. 4

14. Which of the following pairs of structures are resonance structures?

A. 1 B. 2 C. 3 D. 4


15. Which of the following is a correct resonance structure of A?

A. 1 B. 2 C. 3 D. 4


A. 1 B. 2 C. 3 D. 4


O

O

O

O

O

O O

O

OH

O

O

A 1 2 3 4 5 A. 1 B. 2 C. 3 D. 4 E. 5

18. Which of the following is a valid resonance pair?

A)

B)

C)

D) none of the above B

19. The indicated lone pairs in the following compounds are:


i) ii) A. i) localized ii) delocalized

B. i) localized ii) localized

C. i) delocalized ii) localized

D. i) delocalized ii) delocalized

20. How many resonance structures does the following compound have (including

itself)?

A. 1 B. 2 C. 3 D. 4 E. 5

21. In the following reaction, identify the acid and base as well as the conjugate acid

and base.

i ii iii iv

A. i) Acid, ii) Base, iii) Conjugate acid, iv) Conjugate base

B. i) Base, ii) Acid, iii) Conjugate acid, iv) Conjugate base

C. i) Base, ii) Acid, iii) Conjugate base, iv) Conjugate acid

D. i) Acid, ii) Base, iii) Conjugate base, iv) Conjugate acid

E. None of the above

22. What is wrong with the following arrow?

A. It should start on the alkyne carbon.

B. It should start on a hydrogen attached to the nitrogen.

C. It should start on the anion on nitrogen, end at the H on the alkyne, and a

second arrow should start at the bond between the C and H on the alkyne and end

on the terminal carbon of the alkyne.

D. There should be two arrows – one from nitrogen and one from the alkyne

carbon.


23. Which side will the following acid-base reaction favor?

A. The right

B. The left

C. Neither

24. For the following acid-base reaction, which procedure represents the best usage of

arrow pushing and correct product formation?

O OH


O OH

H

O

+ H2O

O OH

H

O

+ H2O

O OH O

+ H2O

O OH O

+ H2O

H

H

A.

B.

C.

D.

E. None of the above C

25. Which side will the following acid-base reaction favor?

A. The right

B. The left

C. Neither


26. Identify the Lewis base in the following reaction.

A

27. Identify the Lewis base in the following reaction.

A

28. Which is the best descriptor for the following compound?

A. Bronsted-Lowry Acid

B. Bronsted-Lowry Base

C. Lewis Acid

D. Lewis Base

E. Both B and D

29. Could water protonate the following compound?

A. Yes

B. No

30. What is the IUPAC name for the following compound?

A. 2,3,5-triethylhexane

B. 2,4,5-triethylhexane

C. 2,4-diethyl-5-methylheptane

D. 4-ethyl-3,6-dimethyloctane



A. 1-ethyl-2-methylcyclohexane

B. 2-ethyl-1-methylcyclohexane

C. 1-ethyl-2-methylhexane

D. cyclononane

32. What is the common name of the following substituent?

A. isopropyl

B. tert-butyl

C. iso-butyl

D. sec-butyl


A. 3-isopropyl-5-ethylheptane

B. 2-methyl-3-ethyl-5-ethylheptane

C. 3,5-diethyl-2-methylheptane

D. 2-methyl-3,5-diethylheptane

34. How many constitutional isomers does C6H14 have?

A. 3 B.4 C.5 D.6 E.7

35. Which of the following compounds are constitutional isomers?

1 2 3 4 A. 1 and 2 B. 2 and 3 C. 3 and 4 D. 1 and 3 E. none of these

36. Using Newman projection to determine the conformation between Cl and Br

substituents in the following compound.


A. Gauche B. Anti C. Eclipsed D. Syn E. none of these

37. Which of the following is a Newman projection for the following compound as

viewed down the indicated bond?

C

38. Which of the following is the most stable conformer of the most stable isomer of

1,4-diethylcyclohexane?

C

39. Rank the following conformers of the isomers of 1-ethyl-2,4-

dimethylcyclohexane from most to least stable.

A. iii>iv>ii>i

B. ii>i>iii>iv

C. iv>i>iii>ii

D. i>iii>ii>iv

E. none of the above

40. How many chiral centers does these two compounds have in total?

A) 5 B) 6 C) 7 D) 8 E) 9

A. B. C. D.i ii iii


41. Are the following alkenes cis, trans, or neither? OMe F

Fi) ii)

A) i) trans; ii) trans

B) i) trans; ii) neither

C) i) cis; ii) trans

D) i) neither; ii) trans

E) none of the above

42. Identify the relationship between the following two structures.

A. Enantiomers

B. Identical

C. Diastereomers

D. Constitutional isomers


43. which of the following is the correct structure for a compound with the IUPAC

name (R)-2-pentanol?

C

44. Which of the following is the correct IUPAC name for the following structure?

A. (S)-3-ethyl-2-methylhexane

B. (R)-3-ethyl-2-methylhexane

C. (S)-3-ethyl-2-methylpentane

D. (R)-3-ethyl-2-methylpentane


45. Rank the following from highest to lowest priority.

i) -CH3 ii) -CN iii) -CH2OH iv) -Br

A) iii>i>ii>iv

B) ii>iii>iv>i

C) iii>ii>i>iv

D) iv>iii>ii>i

E) iv>ii>iii>i

46. Identify the relationship between the following two structures.

A. Enantiomers

B. Identical

C. Diastereomers

D. Constitutional isomers


47. (2R,3S)-Dibromobutane is:

A. optically active.

B. racemic.

C. dextrorotatory.

D. a meso compound.

48. Assign R or S configuration to each chirality center indicated in streptimidone.

a. (i) S; (ii) S

b. (i) S; (ii) R

c. (i) R; (ii) R

d. (i) R; (ii) S

HOH2C CHO

HO H

OHH

OHH

OHC CH2OH

H OH

HO H

HO H

(i)(ii)


49. Which of the following structures is the correct wedge/dash drawing of the

following Fischer projection?

D

50. Assign the following stereocenter as R or S.

A. R B. S C. there is no chiral center on this compound.

51. What type of cleavage does the following reaction involve?

i)

ii)

A. i) homolytic; ii) homolytic

B. i) heterolytic; ii) heterolytic

C. i) homolytic; ii) heterolytic

D. i) heterolytic; ii) homolytic

52. Why is entropy negative for ring closures?

A. Closing a ring results in fewer molecules.

B. Closing a ring results in more molecules.

C. Closing a ring releases energy.

D. Closing a ring restricts the rotation around individual carbon-carbon bonds

55. Which of the following is an energy diagram for a three step reaction? (B)

B


56. What is a transition state?

A. An isolable intermediate in a reaction.

B. The starting materials of the reaction.

C. A local maximum on the energy diagram.

D. A point between the starting materials and the product.

57. What is an intermediate?

A. A point on the reaction pathway that has a discrete lifetime.

B. A local maximum on the energy diagram.

C. A point half-way between the starting materials and products.

D. The highest energy compound on an energy diagram.

58. Identify the nucleophilic atom(s) in the following molecule?

A. carbon at the right terminus

B. oxygen

C. nitrogen

D. all of the above

E. both B and C

59. Which of the following cannot be a electrophile?

D

60. For the following reaction step, indicate which pattern it belongs to?

A. Proton Transfer

B. Loss of Leaving Group

C. Nucleophilic Attack

D. Rearrangement


61. For the following reaction step, indicate which pattern it belongs to?

A. Proton Transfer

B. Loss of Leaving Group

C. Nucleophilic Attack

D. Rearrangement

62. What is wrong with the following mechanism?

A. There is no leaving group, so there should be no arrows.

B. The arrow should be removing a proton from the H2O group.

C. An arrow is also needed to indicate the loss of the leaving group.

D. The arrow indicating the formation of the C-Br bond (nucleophilic attack)

should start at the bromide anion.

63. Identify the sequence of steps in the following reaction.

A. Proton transfer, Proton transfer

B. Proton transfer, Loss of leaving group

C. Nucleophilic attack, Proton transfer

D. Proton transfer, Nucleophilic attack

64. Identify the sequence of steps in the following reaction.

A. Proton transfer, Proton transfer, Nucleophilic Attack

B. Proton transfer, Nucleophilic attack, Proton transfer

C. Nucleophilic attack, Proton transfer, Loss of leaving group

D. Proton transfer, Loss of leaving group, Nucleophilic Attack


65. Which of the following is the correct IUPAC name of the following structure?

A. 2-Bromo-3-butylpentane

B. (2S)-Bromo-4,5-dimethylheptane

C. 3,4-Dimethyl-6-bromoheptane

D. 2-Bromo-4-methylhexane

66. How many primary carbons are there in the following compound?

O

F

FF

A) 1 B) 2 C) 3 D) 4 E) 5

67. Which of the following is a reasonable definition of a concerted reaction?

A. It is a reaction which takes place in a series of steps.

B. It is a reaction which produces a loud noise.

C. It is a reaction in which all bond-breaking and bond-forming occurs at the

same time.

D. It is a substitution reaction.

68. Which of the following is not a possible step in a substitution reaction?

D


69. Which of the following is the product of the following SN2 reaction?

C

70. Rank the following substrates from most to least reactive in an SN2 reaction.

A. A>B>C>D

B. D>C>B>A

C. A>C>B>D

D. D>C>B>A


A. A>B>C>D

B. C>D>B>A

C. C>B>A>D

D. D>C>B>A


A. A>B>C>D

B. A>B>D>C

C. D>A>B>C

D. D>C>B>A


73. Which of the following is the major product for the following SN1 reaction?

B

74. What type of solvent would be best for obtaining an optically active product in the

following reaction?

A. polar protic

B. polar aprotic

C. apolar aprotic

D. water

75. Which of the following is the correct IUPAC name for the following compound?

A. 2-ethyl-1,1,3-trimethylbutene

B. 3-ethyl-2,4-dimethyl-2-pentene

C. 2,4-dimethylhexene

D. 4-ethyl-1,3-dimethyl-3-pentene

76. Which of the following is the correct IUPAC name for the following compound?

A) (3S, 4Z)-3,4,5-trimethyl-4-heptene

B) (3R, 4E)-3,4,5-trimethyl-4-heptene

C) (3Z, 5S)-3,4,5-trimethyl-3-heptene

D) (3E, 5R)-3,4,5-trimethyl-3-heptene



77. Is the following alkene?

A. E B. Z C. neither

78. Rank the following from most to least stable.

A) A, B, C

B) C, B, A

C) B, C, A

D) B, A, C

79. Which of the following alkyl halides would afford the indicated product upon

reaction with sodium ethoxide?

Ph

Cl

Ph

Cl

Ph

Cl

Ph

Cl

A. B. C. D.

B

80. What is the product of the following elimination?

A B C D E. none of these

C

81. Which of the following shows a mechanism for a concerted elimination?


A

82. What would be the best base for performing the following elimination?

A. NaOMe

B. NaOH

C. NaH

D. NaOtBu

E. NaNH2

83. What is the product of the following elimination?

A B C D E E

84. Which of the following alkyl halides would afford the indicated product upon

reaction with sodium ethoxide?

E. both C and D

E

85. What are the steps in the following mechanism in correct order?


A) loss of leaving group, rearrangement, proton transfer

B) concerted in one step: Proton transfer, loss of leaving group, proton transfer

C) Proton transfer, loss of leaving group, rearrangement, proton transfer

D) Proton transfer, loss of leaving group, proton transfer, rearrangement


86. Which of the following is the structure of the rearranged carbocation in the

following dehydration?

B

87. The expected Markovnikov addition product of HI to 2-methyl-2-butene is:

A) 2-iodopentane

B) 2-iodo-1-methylbutane

C) 1-iodo-2-methylbutane

D) 2-iodo-2-methylbutane

E) 3-iodo-2-methylbutane

88. What is the expected major product for the following reaction?

D

Br Br

Br

Br

II III IV VI

HBr?

ROOR

A B C D E


89. Which of the alkenes below would be expected to produce a chirality center upon

hydrohalogenation in the presence of peroxide?

A)

B)

C)

D)

E)

90. Treatment of (S)-6-chloro-1-methyl-1-cyclohexene with H3O+ is expected to

produce which of the following?

A) I and III B) II C) III and V D) IV E) I, III and V


A) B) C)

D) E)


92. What is the expected major product for the following reaction sequence?

A)

B)

C)

D)

E)

93. What is the expected major product for the following reaction sequence?

D

1. BD3•THF

2. H2O2, NaOH

OH D DHO OHD D

+enantiomer

+enantiomer

+enantiomer

+enantiomer

+enantiomer

I II III IV VA B C D E



D

96. Treating 2-methyl-2-pentene with Br2 is expected to produce which of the

following as the major product?

A) 2,3-dibromo-2-methylpentane

B) 2,2-dibromo-2-methylpentane

C) 3,3-dibromo-2-methylpentane

D) 2-bromo-2-methylpentane

E) 3-dibromo-2-methylpentane

97. The reaction of Br2 with 1-methylcyclohexene, in the presence of ethylamine

(EtNH2), is expected to produce which of the following as the major product?

Br2, CH3OH

OH

Br

H3CO

Br

Br

OCH3

OCH3

Br

I II III IV V

+enantiomer

+enantiomer

+enantiomer

+enantiomer

BrH3CO

?

A B C D E

A B C D EI II III IV V

+enantiomer

+enantiomer

+enantiomer

+enantiomer

CH3

NHEt

Br

CH3

Br

NHEt

CH3

NHEt

Br

CH3

Br

NHEt

NHEtBr


99. Of the alkenes shown, which would produce the product shown below, upon

treatment with ozone, followed by zinc metal and water?

B

100. What is the expected major product of the following reaction sequence?

C

101. What is the expected major product of the following reaction sequence?

A) B) C)

D) E)

A B C D E

CC

C

O

CC

CC

O

H

HH

HH

HH

HHH

H

H

I II III IV V

CH3 CH3 CH3

?

A B C D E

1. t-BuOK, t-BuOH

2. HBr

Cl

Br Br

Br

Br

Br Cl

I II III IV V


102. For the following reaction sequence, which molecule is an expected major

product?

A) B) C)

D) E)

103. Provide the systematic IUPAC name for (CH3)2CHC≡CCH2C(CH3)3.

A) 1,1,5,5,5-Pentamethyl-2-pentyne

B) 1,1,1,5,5-Pentamethyl-3-pentyne

C) 2,2,6-trimethyl-4-heptyne

D) 2,6,6-trimethyl-3-heptyne

E) tert-butylisopropylacetylene

104. What is the correct IUPAC name for the molecule shown below?

A) (E)-4-isopropyloct-3-en-5-yne

B) (Z)-4-isopropyloct-3-en-5-yne

C) (E)-5-isopropyloct-5-en-3-yne

D) (Z)-5-isopropyloct-5-en-3-yne

E) (E)-4-(2-methylethyl)oct-3-en-5-yne

105. Treatment of 2,2-dibromobutane with molten KOH at 200°C would be expected

to produce which of the following?

A) (E)-2-bromo-2-butene

B) (Z)-2-bromo-2-butyne

C) 1,2-butadiene

D) 1-butyne

E) 2-butyne


106. What is the expected major organic product from treatment of 4-methyl-2-pentyne

with hydrogen in the presence of Lindlar's catalyst?

A) (E)-4-methyl-2-pentene

B) (Z)-4-methyl-2-pentene

C) (E)-2-methyl-2-pentene

D) (Z)-2-methyl-2-pentene

E) 2-methylpentane

107. What is the major expected product(s) of the reaction shown below?

A) 2,2-Dichloropentane

B) 3,3-Dichloropentane

C) 2,3-Dichloropentane

D) A and B

E) B and C

108. Which of the following alkynes would give a single product under hydroboration-

oxidation conditions?

A) 1-hexyne

B) 2-hexyne

C) 3-hexyne

D) A and B would each give a single product

E) A and C would each give a single product

109. Select the alkyne listed below that, upon treatment with ozone followed by water,

would not produce carbon dioxide and a carboxylic acid as the final products?

A) Ethyne

B) Propyne

C) 1-Butyne

D) 1-Pentyne

E) 1-Hexyne


110. Which sequence of reactions is expected to produce cis-3-octene as the final, and

major, organic product?

A) I B) II C) III D) IV E) V

111. Which sequence of reactions is expected to produce the product below as the

final, and major, organic product?

A) 1) H2, Lindlar’s cat.; 2) OsO4; 3) NaHSO3/H2O

B) 1) H2, Pt; 2) OsO4; 3) NaHSO3/H2O

C) 1) OsO4; 2) NaHSO3/H2O; 3) H2, Lindlar’s cat.

D) 1) Na, NH3(l); 2) OsO4; 3) NaHSO3/H2O

E) 1) OsO4; 2)NaHSO3/H2O; 3) Na, NH3(l)

48. Which is the product for the following SN2 reaction? Ans: D

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Study Union: CHM 2210 Final Exam Review 1. The following ... · Final Exam: 5/03 4-6:50 PM Study Union: CHM 2210 Final Exam Review 1. The following molecules are related in what manner?