Preferred Label : low-spin state;
IUPAC acronym : LUMO; HOMO;
IUPAC definition : When the separation between the highest occupied and the lowest unoccupied molecular
orbitals is not large, two alternative electronic states may be considered. The state
with two electrons paired up in the HOMO is called a low-spin state. The low-spin
state is the ground state when the one-electron energy needed to promote an electron
to the LUMO is larger than the Coulomb and exchange repulsion energies required to
pair up two electrons in the HOMO.;
Origin ID : LT07067;
See also
When the separation between the highest occupied and the lowest unoccupied molecular
orbitals is not large, two alternative electronic states may be considered. The state
with two electrons paired up in the HOMO is called a low-spin state. The low-spin
state is the ground state when the one-electron energy needed to promote an electron
to the LUMO is larger than the Coulomb and exchange repulsion energies required to
pair up two electrons in the HOMO.
