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. In an octahedral complex:

It is possible to accommodate more than 18 valence electrons; the resulting complexes will be very stable. correct incorrect

It is possible to accommodate fewer than 18 valence electrons; the resulting complexes will be very unstable. correct incorrect

When π-acceptor ligands are present, nine bonding MOs with space for a total of 18 valence electrons are possible. correct incorrect

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. The hapticity of an organometallic compound refers to:

the number of ligand atoms that are considered formally to be bonded to the metal atom correct incorrect

the number of metal atoms that are considered formally to be bonded to a single ligand atom correct incorrect

the number of ligands present correct incorrect

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. Which statement is correct?

CO is very good at stabilizing low oxidation states; many complexes can have the metal in its zero oxidation state. correct incorrect

CO is very good at stabilizing low oxidation states; many complexes can have the metal in its highest oxidation state. correct incorrect

CO is very good at stabilizing low oxidation states; however, the metal is never present in zero oxidation state. correct incorrect

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. The bonding of a hydrogen atom to a metal atom is realized through:

π-backbonding only correct incorrect

σ-bonding only correct incorrect

a combination of σ- bonding and π-backbonding correct incorrect

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. Backbonding from a metal atom to a benzene ligand is possible only as a:

s-interaction between a₁ benzene MO and the d_z2 metal orbital correct incorrect

p-interaction between e₁, e₂ benzene MO and the d_zx, d_yz metal orbitals correct incorrect

d-interaction between the antibonding e₂ benzene orbitals and the d_x2-y2, d_xy metal orbitals correct incorrect

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. The difference between the Fischer and Schrock carbenes is that:

Fischer carbenes are electron rich and can be attacked by electrophiles; Schrock carbenes are electron poor and can be attacked by nucleophiles. correct incorrect

Fischer carbenes are electron poor and can be attacked by nucleophiles; Schrock carbenes are electron rich and can be attacked by electrophiles. correct incorrect

They differ based on the metal they are bonded with; correct incorrect

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. Reactions of the CO ligand include:

nucleophilic attacks on the carbon atom and electrophilic attacks on the oxygen atom correct incorrect

nucleophilic attacks on the oxygen atom and electrophilic attacks on the carbon atom correct incorrect

nucleophilic attacks on both the oxygen and carbon atoms correct incorrect

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. Many metallocenes exhibit fluxionality and undergo internal rotation because:

the energy barrier to the interconversion is nonexistent correct incorrect

the energy barrier to the interconversion is low correct incorrect

the energy barrier to the interconversion is infinite correct incorrect

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. Oxidative addition:

decreases the coordination number and the oxidation number of the metal atom by 2 correct incorrect

decreases the coordination number the metal atom by 2; increases the oxidation number of the metal atom by 2 correct incorrect

increases both the coordination number and the oxidation number of the metal atom by 2 correct incorrect

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. Sigma-bond metathesis is common for:

early d-metal complexes with an insufficient number of electrons on the metal atom correct incorrect

late d-metal complexes with an insufficient number of electrons on the metal atom correct incorrect

late d-metal complexes with a large number of electrons on the metal atom correct incorrect