Organometallic Flashcards

1
Q

How many electrons does NO (bent) contribute and what formal charge does it possess after removal?

A

Electrons: 1

Charge: -1

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2
Q

How many electrons does an alkene contribute and what formal charge does it possess after removal?

A

Electrons: 2

Charge: 0

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3
Q

How many electrons does an NO (linear) contribute and what formal charge does it possess after removal?

A

Electrons: 3

Charge: +1

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4
Q

How many electrons does an η8 contribute and what formal charge does it possess after removal?

A

Electrons: 8

Charge: -2

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5
Q

How many electrons does an OR contribute and what formal charge does it possess after removal?

A

Electrons: 1 or 3

Charge: -1

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6
Q

What happens during oxidative addition?

A

Oxidation state increases by 2.

Coordination number increases by 2.

Number of valence electrons increases by 2.

Number of d electrons decreases by 2.

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7
Q

When can reductive elimination occur?

A

Only for cis-ligands.

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8
Q

What is acyl formation a type of?

A

1,1-migratory insertion

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9
Q

What factors favour oxidative addition?

A

Heavier elements of a group.

When the metal is electron rich.

When hard or strong σ-donor ligands are present.

Small ligands are present.

The metal is large.

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10
Q

What are the features of a Schrock alkylidene?

A

The metal is early, electron poor.

The carbon is nucleophilic.

The ligands are π-donors.

The binding is triplet.

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11
Q

What are the features of a Fischer carbene?

A

The metal is late, electron rich.

The carbon is electrophilic.

The ligands are π-acceptors.

The binding is singlet (donor acceptor).

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12
Q

What is the reactivity of Schrock carbenes?

A

They react analogous to a Wittig reaction.

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13
Q

What is the reactivity of Fischer carbenes?

A

Heteroatom substitution

Cyclopropanations

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14
Q
A
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