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
__made from a sp0.30 hybrid
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
__made from a sp0.40 hybrid
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
__made from a sp0.36 hybrid
7. A lone pair orbital for O2 with 0.9974 electrons
__made from a sp0.46 hybrid
-With core pairs on: N 1 O 2 -
Top of page.
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
Top of page.
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
Top of page.
-> Return to Molecular Structure Page.
-> Return to Chemistry Home Page