## NO, nitric oxide

 N1 = O2
The multiplicity is 2.

## Atomic Charges and Dipole Moment

N1 charge=-0.025
O2 charge= 0.025
with a dipole moment of 0.15987 Debye

## Bond Lengths:

between N1 and O2: distance=1.171 ang___

## Bond Orders (Mulliken):

between N1 and O2: order=1.991___

## 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 N1-O2 with 1.0000 electrons
__has 40.83% N 1 character in a sp2.93 hybrid
__has 59.17% O 2 character in a sp2.33 hybrid

2. A bonding orbital for N1-O2 with 1.0000 electrons
__has 32.32% N 1 character in a p-pi orbital ( 99.35% p 0.65% d)
__has 67.68% O 2 character in a p-pi orbital ( 99.76% p 0.24% d)

5. A lone pair orbital for N1 with 0.9994 electrons

6. A lone pair orbital for N1 with 0.9958 electrons
__made from a p-pi orbital ( 99.98% p)

7. A lone pair orbital for O2 with 0.9981 electrons

8. A lone pair orbital for O2 with 0.9953 electrons
__made from a p-pi orbital ( 99.95% p)

-With core pairs on: N 1 O 2 -

#### Up Electrons

1. A bonding orbital for N1-O2 with 1.0000 electrons
__has 40.03% N 1 character in a sp2.46 hybrid
__has 59.97% O 2 character in a sp2.04 hybrid

2. A bonding orbital for N1-O2 with 1.0000 electrons
__has 25.82% N 1 character in a p-pi orbital ( 99.22% p 0.78% d)
__has 74.18% O 2 character in a p-pi orbital ( 99.77% p 0.23% d)

3. A bonding orbital for N1-O2 with 1.0000 electrons
__has 31.33% N 1 character in a p-pi orbital ( 99.32% p 0.68% d)
__has 68.67% O 2 character in a p-pi orbital ( 99.75% p 0.25% d)

6. A lone pair orbital for N1 with 0.9988 electrons

7. A lone pair orbital for O2 with 0.9974 electrons

-With core pairs on: N 1 O 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.

12 ----- 6.432 11 ----- 6.427

10 ----- 4.248

9 ----- -4.717
8 -^--- -4.622

7 -^-v- -11.76

6 -^-v- -12.80

5 -^-v- -12.96

4 -^-v- -16.78

3 -^-v- -31.21

2 -^-v- -381.1

1 -^-v- -510.3

## 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 = -129.9417143887 Hartrees