## SeO, selenium monoxide

 O1 = SE2
The multiplicity is 3.

## Atomic Charges and Dipole Moment

O1 charge=-0.259
SE2 charge= 0.259
with a dipole moment of 2.17791 Debye

## Bond Lengths:

between O1 and SE2: distance=1.698 ang___

## Bond Orders (Mulliken):

between O1 and SE2: order=1.855___

## Best Lewis Structure

The Lewis structure that is closest to your structure is determined. The hybridization of the atoms in this idealized Lewis structure is given in the table below. The Lewis structure is built for the up and down electrons, separately. Note that the up and down structures can be very different.

### Hybridization in the Best Lewis Structure

#### Down Electrons

1. A bonding orbital for O1-Se2 with 1.0000 electrons
__has 74.47% O 1 character in a s0.68 p3 hybrid
__has 25.53% Se 2 character in a s0.35 p3 hybrid

17. A lone pair orbital for O1 with 0.9996 electrons

18. A lone pair orbital for O1 with 0.9970 electrons
__made from a p-pi orbital ( 99.90% p 0.10% d)

19. A lone pair orbital for O1 with 0.9970 electrons
__made from a p-pi orbital ( 99.90% p 0.10% d)

20. A lone pair orbital for Se2 with 0.9997 electrons

21. A lone pair orbital for Se2 with 0.9983 electrons
__made from a p-pi orbital ( 99.85% p 0.15% d)

22. A lone pair orbital for Se2 with 0.9983 electrons
__made from a p-pi orbital ( 99.85% p 0.15% d)

-With core pairs on: O 1 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 -

#### Up Electrons

1. A bonding orbital for O1-Se2 with 1.0000 electrons
__has 68.27% O 1 character in a s0.79 p3 hybrid
__has 31.73% Se 2 character in a s0.48 p3 hybrid

2. A bonding orbital for O1-Se2 with 1.0000 electrons
__has 63.76% O 1 character in a p-pi orbital ( 99.68% p 0.32% d)
__has 36.24% Se 2 character in a p-pi orbital ( 97.94% p 2.06% d)

3. A bonding orbital for O1-Se2 with 1.0000 electrons
__has 63.76% O 1 character in a p-pi orbital ( 99.68% p 0.32% d)
__has 36.24% Se 2 character in a p-pi orbital ( 97.94% p 2.06% d)

19. A lone pair orbital for O1 with 0.9991 electrons

20. A lone pair orbital for Se2 with 0.9994 electrons

-With core pairs on: O 1 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 Se 2 -

## Molecular Orbital Energies

The orbital energies are given in eV, where 1 eV=96.49 kJ/mol. Orbitals with very low energy are core 1s orbitals. More antibonding orbitals than you might expect are sometimes listed, because d orbitals are always included for heavy atoms and p orbitals are included for H atoms. Up spins are shown with a ^ and down spins are shown as v. Only the spin up electron orbital energies are given.

26 ----- 4.774
25 ----- 4.527 24 ----- 4.527

23 ----- -1.963

22 -^--- -6.206 21 -^--- -6.208

20 -^-v- -9.918 19 -^-v- -9.922

18 -^-v- -10.59

17 -^-v- -17.02

16 -^-v- -25.34

15 -^-v- -56.45 14 -^-v- -56.45

13 -^-v- -56.58 12 -^-v- -56.58
11 -^-v- -56.68

10 -^-v- -153.3 9 -^-v- -153.3

8 -^-v- -153.5

7 -^-v- -207.5

6 -^-v- -508.3

5 -^-v- -1406.
4 -^-v- -1406. 3 -^-v- -1406.

2 -^-v- -1563.

1 -^-v- -12283

## Total Electronic Energy

The total electronic energy is a very large number, so by convention the units are given in atomic units, that is Hartrees (H). One Hartree is 2625.5 kJ/mol. The energy reference is for totally dissociated atoms. In other words, the reference state is a gas consisting of nuclei and electrons all at infinite distance from each other. The electronic energy includes all electric interactions and the kinetic energy of the electrons. This energy does not include translation, rotation, or vibration of the the molecule.

Total electronic energy = -2476.6068950302 Hartrees