Organometallic Flashcards
How many electrons does NO (bent) contribute and what formal charge does it possess after removal?
Electrons: 1
Charge: -1
How many electrons does an alkene contribute and what formal charge does it possess after removal?
Electrons: 2
Charge: 0
How many electrons does an NO (linear) contribute and what formal charge does it possess after removal?
Electrons: 3
Charge: +1
How many electrons does an η8 contribute and what formal charge does it possess after removal?
Electrons: 8
Charge: -2
How many electrons does an OR contribute and what formal charge does it possess after removal?
Electrons: 1 or 3
Charge: -1
What happens during oxidative addition?
Oxidation state increases by 2.
Coordination number increases by 2.
Number of valence electrons increases by 2.
Number of d electrons decreases by 2.
When can reductive elimination occur?
Only for cis-ligands.
What is acyl formation a type of?
1,1-migratory insertion
What factors favour oxidative addition?
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.
What are the features of a Schrock alkylidene?
The metal is early, electron poor.
The carbon is nucleophilic.
The ligands are π-donors.
The binding is triplet.
What are the features of a Fischer carbene?
The metal is late, electron rich.
The carbon is electrophilic.
The ligands are π-acceptors.
The binding is singlet (donor acceptor).
What is the reactivity of Schrock carbenes?
They react analogous to a Wittig reaction.
What is the reactivity of Fischer carbenes?
Heteroatom substitution
Cyclopropanations
