3B Catalysis Flashcards
Ligand binding through multiple donor atoms to one coordination center
Chelation
Transition metals are elements that can form
chelates or pincers.
What are multidentate ligands?
Multidentate ligands are ligands that can attach to a central metal atom at multiple points.
What are the ligand exchange mechanisms?
associative
dissociative
oxidative addition
reductive elimination
bonding metathesis
olefine metathesis
What is transmetalation?
Transmetalation is a process involving the transfer of a metal from one ligand to another.
What are ligand transformation mechanisms?
1,1-migratory insertions
decarbonylation
1,2-migratory insertion
β-hydride elimination.
What is a catalyst?
A catalyst is a substance that alters the rate of reaction without appearing in any of the products.
What does a catalyst do for a reversible reaction?
A catalyst alters the rate at which equilibrium is attained.
What is a homogenous catalyst?
A homogenous catalyst is in the same phase as the components of the reaction.
What is a heterogenous catalyst?
A heterogenous catalyst is in a different phase from the components of the reaction.
Consists of a series of stoichiometric reactions that form a closed loop
Catalytic cycle
oxidative addition is stepwise if A-B is
polar
