Question 1

Identify the correct statement:

Accepted Answer

A)  CO is a weak F1F1F1S1F1F1F10 donor but a good F1F1F1S1F1F1F10 acceptor. 
B)  C-O bond is stronger when CO is coordinated to an electron-rich metal. 
C)  Ultraviolet spectroscopy can tell us a lot about M-CO bonding. 
A)  CO is a weak F1F1F1S1F1F1F10 donor but a good F1F1F1S1F1F1F10 acceptor. 
B)  C-O bond is stronger when CO is coordinated to an electron-rich metal. 
C)  Ultraviolet spectroscopy can tell us a lot about M-CO bonding. A

Question 2

Identify the best F1F1F1S1F1F1F10 acceptor among these phosphines:

Accepted Answer

A)  PCl3 
B)  P(OEt)3 
C)  P(i-Pr)3 
A)  PCl3 
B)  P(OEt)3 
C)  P(i-Pr)3 A

Question 3

How many electrons can an allyl ligand donate?

Accepted Answer

A)  In F1F1F1S1F1F1F101 bonding mode two electrons with single negative charge, in F1F1F1S1F1F1F103 mode three electrons with single negative charge. 
B)  In F1F1F1S1F1F1F101 bonding mode two electrons with single negative charge, in F1F1F1S1F1F1F103 mode four electrons with single negative charge. 
C)  In F1F1F1S1F1F1F101 bonding mode one electron with single negative charge, in F1F1F1S1F1F1F103 mode three electrons with single negative charge. 
A)  In F1F1F1S1F1F1F101 bonding mode two electrons with single negative charge, in F1F1F1S1F1F1F103 mode three electrons with single negative charge. 
B)  In F1F1F1S1F1F1F101 bonding mode two electrons with single negative charge, in F1F1F1S1F1F1F103 mode four electrons with single negative charge. 
C)  In F1F1F1S1F1F1F101 bonding mode one electron with single negative charge, in F1F1F1S1F1F1F103 mode three electrons with single negative charge. B

Question 4

Many metallocenes exhibit fluxionality and undergo internal rotation because:

Accepted Answer

A)  the energy barrier to the interconversion is nonexistent 
B)  the energy barrier to the interconversion is low 
C)  the energy barrier to the interconversion is infinite 
A)  the energy barrier to the interconversion is nonexistent 
B)  the energy barrier to the interconversion is low 
C)  the energy barrier to the interconversion is infinite

Question 5

Which of the following metal centres is likely to obey 18-electron rule in their organometallic compounds

Accepted Answer

A)  Nb(V) 
B)  Ru(II) 
C)  Ir(I) 
A)  Nb(V) 
B)  Ru(II) 
C)  Ir(I)

Question 6

Beta hydride elimination is

Accepted Answer

A)  a reverse reaction of 1,2-insertion and occurs when the metal has an open coordination site and the organic ligand has hydrogen atoms on second carbon from the metal. 
B)  elimination of two hydride ligands from one metal centre resulting in formation of H2 and decrease in coordination number. 
C)  elimination of hydrogen atom from the second carbon atom of the organic ligand coordinated to a metal centre using a strong base. 
A)  a reverse reaction of 1,2-insertion and occurs when the metal has an open coordination site and the organic ligand has hydrogen atoms on second carbon from the metal. 
B)  elimination of two hydride ligands from one metal centre resulting in formation of H2 and decrease in coordination number. 
C)  elimination of hydrogen atom from the second carbon atom of the organic ligand coordinated to a metal centre using a strong base.

Question 7

Organometallic complexes of ________ and __________ are used as catalysts in olefin metathesis.

Accepted Answer

A)  Os and Fe 
B)  Pt and Ir 
C)  Ru and Mo 
A)  Os and Fe 
B)  Pt and Ir 
C)  Ru and Mo

Question 8

Which of the following carbonyls should be the easiest to reduce?

Accepted Answer

A)  [Fe(CO)5] 
B)  [Cr(CO)6] 
C)  [V(CO)6] 
A)  [Fe(CO)5] 
B)  [Cr(CO)6] 
C)  [V(CO)6]

Question 9

Identify the correct statement(s):
(i) During an oxidative addition reaction, the oxidation state of the metal increases for two and the coordination number increases for two.
(ii) A characteristic of reductive elimination is a decrease in both oxidation state and coordination number by 2.
(iii) Sigma bond metathesis takes place as side-reaction during oxidative addition.

Accepted Answer

A)  All three 
B)  (i) and (ii) 
C)  (ii) and (iii) 
A)  All three 
B)  (i) and (ii) 
C)  (ii) and (iii)

Question 10

Which of the following statements outline the similarities between F1F1F1S1F1F1F106-benzene and F1F1F1S1F1F1F105-cyclopentadienyl ligands?
(i) They are both six electron donors in donor-pair method of electron counting.
(ii) We can consider both to occupy three coordination sites around a metal center.
(iii) They have the same charge.

Accepted Answer

A)  (i) and (ii) 
B)  (ii) and (iii) 
C)  All of them are correct. 
A)  (i) and (ii) 
B)  (ii) and (iii) 
C)  All of them are correct.

Identify the correct statement:

Identify the best  acceptor among these phosphines:

How many electrons can an allyl ligand donate?

Many metallocenes exhibit fluxionality and undergo internal rotation because:

Which of the following metal centres is likely to obey 18-electron rule in their organometallic compounds

Beta hydride elimination is

Organometallic complexes of and __ are used as catalysts in olefin metathesis.

Which of the following carbonyls should be the easiest to reduce?

Atomic Structure

Molecular Structure and Bonding

Molecular Symmetry

The Structures of Simple Solids

Acids and Bases

Oxidation and Reduction

An Introduction to Coordination Compounds

Physical Techniques in Inorganic Chemistry

Periodic Trends

Hydrogen

The Group 1 Elements

The Group 2 Elements

The Group 13 Elements

The Group 14 Elements

The Group 15 Elements

The Group 16 Elements

The Group 17 Elements

The Group 18 Elements

The D-Block Elements

The D-Metal Complexes: Electronic Structure and Spectra

Coordination Chemistry: Reactions of Complexes

The F-Block Metals

Materials Chemistry and Nanomaterials

Green Chemistry

Biological Inorganic Chemistry

Inorganic Chemistry in Medicine

Filters

Exam 22: D-Metal Organometallic Chemistry

Identify the correct statement:

Identify the best  acceptor among these phosphines:

How many electrons can an allyl ligand donate?

Many metallocenes exhibit fluxionality and undergo internal rotation because:

Which of the following metal centres is likely to obey 18-electron rule in their organometallic compounds

Beta hydride elimination is

Organometallic complexes of ________ and __________ are used as catalysts in olefin metathesis.

Which of the following carbonyls should be the easiest to reduce?

Atomic Structure

Molecular Structure and Bonding

Molecular Symmetry

The Structures of Simple Solids

Acids and Bases

Oxidation and Reduction

An Introduction to Coordination Compounds

Physical Techniques in Inorganic Chemistry

Periodic Trends

Hydrogen

The Group 1 Elements

The Group 2 Elements

The Group 13 Elements

The Group 14 Elements

The Group 15 Elements

The Group 16 Elements

The Group 17 Elements

The Group 18 Elements

The D-Block Elements

The D-Metal Complexes: Electronic Structure and Spectra

Coordination Chemistry: Reactions of Complexes

The F-Block Metals

Materials Chemistry and Nanomaterials

Green Chemistry

Biological Inorganic Chemistry

Inorganic Chemistry in Medicine

Filters

Organometallic complexes of and __ are used as catalysts in olefin metathesis.