Question 1

The first step in olefin metathesis has the metal alkylidene ([M]=) reacting with an alkene by ____ addition to form a ____ .

Accepted Answer

A)  [2+2],metalcyclopropoane
B)  [4+2],metalcyclobutane
C)  [2+2],metalcyclobutane
D)  [4+2],metalcyclopropane
E)  [2+2],metalcyclopentaneF) A) and B)
G) B) and E)

Question 2

Consider the following reaction.The complex in the middle underwent a(n) _____ reaction to make the final product.

Accepted Answer

A)  oxidative addition
B)  ligand dissociation
C)  insertion
D)  ligand association
E)  reductive eliminationF) C) and E)
G) A) and D)

Question 3

Reacting 1-pentyne with iodobenzene in the presence of CuI,Pd catalyst (in an amine base) will generate ____ as its product.

Accepted Answer

A)  3-phenyl-1-pentyne
B)  1-phenyl-1-pentyne
C)  1-phenyl-1-butyne
D)  1-phenyl-1-propyne
E)  3-phenyl-1-butyneF) A) and E)
G) A) and B)

Question 4

An 18 electron complex loses a ligand to become a 16 electron complex.This is an example of a(n) ____ reaction.

Accepted Answer

A)  oxidative addition
B)  ligand dissociation
C)  insertion
D)  ligand association
E)  reductive eliminationF) C) and E)
G) All of the above

Question 5

Sonogashira and ____ reagents both make use of copper reagents in order to perform cross-coupling reactions.

Accepted Answer

The answer of Sonogashira and ____ reagents both make use...

Question 6

Reacting 2-nitrostyrene with iodobenzene under Heck-Mizoroki conditions will generate ____ as its product.

Accepted Answer

A)  p-nitrostilbene
B)  o-nitrostilbene
C)  m-nitrostilbene
D)  stilbene
E)  p-aminostilbeneF) C) and E)
G) All of the above

Question 7

Transition metals can react with a variety of molecules called ____.

Accepted Answer

A)  transition metal complexes
B)  metals
C)  ligands
D)  complexes
E)  covalent compoundsF) B) and C)
G) D) and E)

Question 8

In the third step in olefin metathesis the ____.

Accepted Answer

A)  metal alkylidene ([M]=) undergoes a [2+2] pericyclic addition with an alkene alkene to form a metalcyclobutane intermediate
B)  metalcyclobutane undergoes a reverse [2+2] addition (i.e.,retro [2+2] reaction) to generate a new metal alkylidene
C)  reaction of the new metal alkylidene with a new alkene (by [2+2] addition) to generate a new metalcyclobutane intermediate
D)  formation of the alkene product from a retro [2+2] reaction of the second metal alkylidene
E)  alkene reacts with a second alkene by [2+2] additionF) A) and B)
G) D) and E)

Question 9

The fifth step in the mechanism of an alkene reacting with Wilkinson's catalyst is ____.

Accepted Answer

A)  insertion
B)  ligand association
C)  oxidative addition
D)  reductive elimination
E)  ligand dissociationF) All of the above
G) A) and B)

Question 10

Which choice could provide the product. _______ + _______

Accepted Answer

A)  benzyl chloride,propyne
B)  benzyl iodide,acetylene
C)  phenyl bromide,1-butyne
D)  phenyl bromide,2-butyne
E)  phenyl iodide,etheneF) A) and C)
G) D) and E)

Question 11

Consider the transition metal complex Ni(CN) 3(H2O) 23-.The total number of valence electrons this complex possesses is ____.

Accepted Answer

A)  2
B)  8
C)  10
D)  12
E)  18F) B) and D)
G) All of the above

Question 12

Coupling a terminal alkyne with an alkenyl halide,using a mixture of a Pd and Cu(I) catalyst,is an example of ____.

Accepted Answer

A)  Stille Coupling and Carbonylation reaction
B)  Suzuki-Miyaura Coupling
C)  Heck-Mizoroki Coupling
D)  Sonogashira Coupling
E)  Gilman Reagent-Mediated CouplingF) B) and D)
G) A) and E)

Question 13

Converting an alkene to an alkane using the catalyst Pd/C is ____ hydrogenation.

Accepted Answer

The answer of Converting an alkene to an alkane using...

Question 14

The total number of valence electrons contributed by all nitrogen atoms toward Re is ____.

Accepted Answer

The answer of The total number of valence electrons contributed...

Question 15

A student wants to make 3-nitro-1-phenyl-1-butyne using Sonogahira coupling conditions,beginning with iodobenzene.This student will also require ____ in order to make this product.

Accepted Answer

The answer of A student wants to make 3-nitro-1-phenyl-1-butyne using...

Question 16

A student wants to make 4-nitro-1-phenyl-1-butyne using Sonogahira coupling conditions,beginning with iodobenzene.This student will also require ____ in order to make this product.

Accepted Answer

The answer of A student wants to make 4-nitro-1-phenyl-1-butyne using...

Question 17

The valence electron count for Cr in CrC6H6(CO)3 is ____.

Accepted Answer

Question 18

Coupling an aryl tin reagent with an alkenyl halide,using a Pd catalyst,is an example of ____.

Accepted Answer

A)  Stille Coupling
B)  Suzuki-Miyaura Coupling
C)  Heck-Mizoroki Coupling
D)  Sonogashira Coupling
E)  Gilman Reagent-Mediated CouplingF) B) and C)
G) A) and B)

Question 19

The third step in the mechanism of an alkene reacting with Wilkinson's catalyst is ____.

Accepted Answer

A)  insertion
B)  ligand association
C)  oxidative addition
D)  reductive elimination
E)  ligand dissociationF) B) and C)
G) A) and B)

Question 20

Consider the transition metal complex Pd(PPh3) 4.The total number of valence electrons this complex possesses is ____.

Accepted Answer

A)  2
B)  8
C)  10
D)  12
E)  18F) A) and C)
G) All of the above

Exam 21: Transition Metal Complexes

A student wants to make 3-nitro-1-phenyl-1-butyne using Sonogahira coupling conditions,beginning with iodobenzene.This student will also require ____ in order to make this product.

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Which choice could provide the product. _______ + _______

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Reacting 2-nitrostyrene with iodobenzene under Heck-Mizoroki conditions will generate ____ as its product.

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Consider the transition metal complex Pd(PPh3) 4.The total number of valence electrons this complex possesses is ____.

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The third step in the mechanism of an alkene reacting with Wilkinson's catalyst is ____.

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Transition metals can react with a variety of molecules called ____.

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The valence electron count for Cr in CrC6H6(CO)3 is ____.

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An 18 electron complex loses a ligand to become a 16 electron complex.This is an example of a(n) ____ reaction.

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In the third step in olefin metathesis the ____.

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Coupling a terminal alkyne with an alkenyl halide,using a mixture of a Pd and Cu(I) catalyst,is an example of ____.

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Coupling an aryl tin reagent with an alkenyl halide,using a Pd catalyst,is an example of ____.

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The first step in olefin metathesis has the metal alkylidene ([M]=) reacting with an alkene by ____ addition to form a ____ .

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A student wants to make 4-nitro-1-phenyl-1-butyne using Sonogahira coupling conditions,beginning with iodobenzene.This student will also require ____ in order to make this product.

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Consider the transition metal complex Ni(CN) 3(H2O) 23-.The total number of valence electrons this complex possesses is ____.

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Sonogashira and ____ reagents both make use of copper reagents in order to perform cross-coupling reactions.

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The fifth step in the mechanism of an alkene reacting with Wilkinson's catalyst is ____.

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Converting an alkene to an alkane using the catalyst Pd/C is ____ hydrogenation.

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Consider the following reaction.The complex in the middle underwent a(n) _____ reaction to make the final product.

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Reacting 1-pentyne with iodobenzene in the presence of CuI,Pd catalyst (in an amine base) will generate ____ as its product.

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The total number of valence electrons contributed by all nitrogen atoms toward Re is ____.

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Which choice could provide the product. _ + _

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Consider the transition metal complex Pd(PPh₃) ₄.The total number of valence electrons this complex possesses is ____.

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The valence electron count for Cr in CrC₆H₆(CO)₃ is ____.

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The first step in olefin metathesis has the metal alkylidene ([M]=) reacting with an alkene by addition to form a .

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Consider the transition metal complex Ni(CN) ₃(H₂O) ₂^3-.The total number of valence electrons this complex possesses is ____.

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