inorganic chemistry exam 1

Metal to ligand pi bonding
(pi back bonding –> pi accepting ligands)
Electrons from d orbitals of the metals now occupy pi orbitals with contribution from the ligands
pi acceptors
ligands that have empty orbitals that can engage in the metal in M–>L pi bonding

(larger delta)

Ligand to Metal pi bonding
pi electrons from the ligands being donated to the metal ion
pi donor
ligands that participate in M–>L pi bonding

(smaller delta)

Strong Field ligand
large delta
low spin
Weak Field Ligand
small delta
high spin
low spin
strong field
large delta
pi acceptor

CO __ CN-

=
low spin
strong field
large delta
pi acceptor

CN- __ phen

>
low spin
strong field
large delta
pi acceptor

phen __ NO2-

>
low spin
strong field
large delta
pi acceptor

NO2- __ en

>
low spin
strong field
large delta
pi acceptor

en __ NH3

>
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