## PO

 O1 = P2
The multiplicity is 2.

## Atomic Charges and Dipole Moment

O1 charge=-0.301
P2 charge= 0.301
with a dipole moment of 2.16489 Debye

## Bond Lengths:

between O1 and P2: distance=1.517 ang___

## Bond Orders (Mulliken):

between O1 and P2: order=1.713___

## 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-P2 with 1.0000 electrons
__has 78.44% O 1 character in a sp2.23 hybrid
__has 21.56% P 2 character in a s0.63 p3 d0.06 hybrid

2. A bonding orbital for O1-P2 with 1.0000 electrons
__has 82.13% O 1 character in a p-pi orbital ( 99.86% p 0.14% d)
__has 17.87% P 2 character in a p-pi orbital ( 96.01% p 3.99% d)

9. A lone pair orbital for O1 with 0.9979 electrons

10. A lone pair orbital for O1 with 0.9886 electrons
__made from a p-pi orbital ( 99.92% p 0.08% d)

11. A lone pair orbital for P2 with 0.9994 electrons

12. A lone pair orbital for P2 with 0.9972 electrons
__made from a p-pi orbital ( 99.59% p 0.41% d)

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

#### Up Electrons

1. A bonding orbital for O1-P2 with 1.0000 electrons
__has 77.15% O 1 character in a sp2.03 hybrid
__has 22.85% P 2 character in a s0.74 p3 d0.05 hybrid

2. A bonding orbital for O1-P2 with 1.0000 electrons
__has 84.49% O 1 character in a p-pi orbital ( 99.86% p 0.14% d)
__has 15.51% P 2 character in a p-pi orbital ( 94.78% p 5.22% d)

3. A bonding orbital for O1-P2 with 1.0000 electrons
__has 78.46% O 1 character in a p-pi orbital ( 99.85% p 0.15% d)
__has 21.54% P 2 character in a p-pi orbital ( 96.22% p 3.78% d)

10. A lone pair orbital for O1 with 0.9974 electrons

11. A lone pair orbital for P2 with 0.9996 electrons

-With core pairs on: O 1 P 2 P 2 P 2 P 2 P 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.

16 ----- 4.532 15 ----- 4.516

14 ----- -0.384

13 ----- -4.683

12 -^--- -4.571

11 -^-v- -9.616
10 -^-v- -9.666

9 -^-v- -9.817

8 -^-v- -13.88

7 -^-v- -25.32

6 -^-v- -124.8

5 -^-v- -124.9

4 -^-v- -125.2

3 -^-v- -172.5

2 -^-v- -507.6

1 -^-v- -2070.

## 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 = -416.6067323577 Hartrees