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CHM 332 > Organometallic Compounds > Flashcards

Organometallic Compounds Flashcards

1
Q
  1. What term describes the process whereby an alkyl halide undergoes reaction with magnesium metal to give an alkylmagnesium bromide (Grignard reagent)?
    A. nucleophilic substitution
    B. electrophilic addition
    C. oxidative addition
    D. reductive elimination
A

C. oxidative addition

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2
Q
  1. What is he change in oxidation state of the metal when magnesium reacts with an alkyl bromide to give an alkylmagnesium bromide (Grignard reagent)?
    A. 0 ® +1
    B. 0 ® +2
    C. 0 ® -1
    D. 0 ® -2
A

B. 0 ® +2

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3
Q
  1. Which of the following is the best choice of solvent for the formation of phenylmagnesium bromide by the reaction of bromobenzene with magnesium?
    A. water
    B. methanol
    C. diethyl ether
    D. acetic acid
A

C. diethyl ether

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4
Q
  1. Which of the following is the best choice of solvent for the formation of phenyllithium by the reaction of bromobenzene with lithium?
    A. water
    B. ethanol
    C. tetrahydrofuran
    D. acetic acid
A

C. tetrahydrofuran

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5
Q
  1. Which of the following bonds has the most ionic character?
    A. C-Al
    B. C-Hg
    C. C-Mg
    D. C-Zn
A

C. C-Mg

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6
Q
  1. Which of the following bonds has the most ionic character?
    A. C-Sn
    B. C-Cu
    C. C-Zn
    D. C-Li
A

D. C-Li

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7
Q
  1. Which of the following compounds is the strongest base?
    A. CH3CH2MgBr
    B. CH3CH2OH
    C. CH3CH2OMgBr
    D. CH3CH3
A

A. CH3CH2MgBr

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8
Q
  1. Which of the following compounds is the strongest base?
    A. NaOH
    B. NH3
    C. CH3Li
    D. CH3OH
A

C. CH3Li

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9
Q
  1. Which of the following molecules are deprotonated by ethylmagnesium bromide?
    A. phenol, PhOH
    B. propyne, CH3CºCH
    C. dimethylamine, (CH3)2NH
    D. all of these
A

D. all of these

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10
Q
  1. Which of the following mechanisms accounts for the acid-base reaction of ethylmagnesum bromide with acetylene to give acetylide anion?
A

A. 1

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11
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

A. 2-methylbutane

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12
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

B. pentane

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13
Q
  1. What is the major organic product obtained from the following reaction?
A

B. 2

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14
Q
  1. What is the major organic product obtained from the following reaction?
A

D. 4

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15
Q
  1. Which of the following alcohols can be prepared from a Grignard reagent and ethylene oxide?
A

B. only 1 and 2

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16
Q
  1. Which of the following alcohols can be prepared from a Grignard reagent and ethylene oxide?
A

D. only 2 and 4

17
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

B. 2

18
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

C. 3

19
Q
  1. Which combination(s) of alkyl bromide and epoxide can be used to prepare the following product by addition of the Grignard reagent derived from the alkyl bromide to the epoxide?
A

B. only 2

20
Q
  1. Which combination(s) of alkyl bromide and epoxide can be used to prepare the following product by addition of the Grignard reagent derived from the alkyl bromide to the epoxide?
A

A. only 1

21
Q
  1. What is the major organic product obtained from the following reaction?
A

A. 1

22
Q
  1. What is the major organic product obtained from the following reaction?
A

D. (E) 2-butene

23
Q
  1. What is the major organic product obtained from the following reaction?
A

A. 1

24
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

C. 2-methyloctane

25
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

D. (E) 6,6-dimethyl-2-heptene

26
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

C. 2-methylheptane

27
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

D. (E)-7-methyl-3-octene

28
Q
  1. Which of the following is not true regarding the carbon atom of the methylene carbene, H2C: ?
    A. it is sp2 hybridized
    B. it has a complete octet of valence electrons
    C. it has a vacant 2p atomic orbital
    D. it has a lone pair of electrons in an sp2 molecular orbital
A

B. it has a complete octet of valence electrons

29
Q
  1. What reactive intermediates are involved in the following reaction?
A

A. the trichloromethyl anion (Cl3C: -) and dichlorocarbene (Cl2C:)

30
Q
  1. What is the major organic product obtained from the following reaction?
A

C. 3

31
Q
  1. What is the major organic product obtained from the following reaction?
A

B. 2

32
Q
  1. What is the major organic product obtained from the following reaction?
A

C. 3

33
Q
  1. What is the major organic product obtained from the following reaction?
A

A. 1

34
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

B. 2

35
Q
  1. What is the major organic product obtained from the following sequence of reactions?
A

C. 3

CHM 332 (12 decks)

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