## C2+ ion

 C1 E C2
The ion charge is 1. The multiplicity is 2.

## Atomic Charges and Dipole Moment

C1 charge= 0.499
C2 charge= 0.500
with a dipole moment of 0 Debye

## Bond Lengths:

between C1 and C2: distance=1.327 ang___

## Bond Orders (Mulliken):

between C1 and C2: order=2.985___

## 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 C1-C2 with 0.9246 electrons
__has 62.34% C 1 character in a sp0.23 hybrid
__has 37.66% C 2 character in a sp1.17 hybrid

2. A bonding orbital for C1-C2 with 1.0000 electrons
__has 50.00% C 1 character in a p-pi orbital ( 99.87% p 0.13% d)
__has 50.00% C 2 character in a p-pi orbital ( 99.87% p 0.13% d)

3. A bonding orbital for C1-C2 with 1.0000 electrons
__has 50.00% C 1 character in a p-pi orbital ( 99.87% p 0.13% d)
__has 50.00% C 2 character in a p-pi orbital ( 99.87% p 0.13% d)

4. A bonding orbital for C1-C2 with 0.9246 electrons
__has 37.67% C 1 character in a s0.69 p3 hybrid
__has 62.33% C 2 character in a sp0.85 hybrid

-With core pairs on: C 1 C 2 -

#### Up Electrons

1. A bonding orbital for C1-C2 with 1.0000 electrons
__has 50.00% C 1 character in a sp0.43 hybrid
__has 50.00% C 2 character in a sp0.43 hybrid

2. A bonding orbital for C1-C2 with 1.0000 electrons
__has 50.00% C 1 character in a p-pi orbital ( 99.49% p 0.51% d)
__has 50.00% C 2 character in a p-pi orbital ( 99.49% p 0.51% d)

3. A bonding orbital for C1-C2 with 1.0000 electrons
__has 50.00% C 1 character in a p-pi orbital ( 99.49% p 0.51% d)
__has 50.00% C 2 character in a p-pi orbital ( 99.49% p 0.51% d)

-With core pairs on: C 1 C 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.

10 ----- -2.722

9 ----- -11.10

8 ----- -11.93

7 ----- -17.81

6 -^--- -17.70

5 -^-v- -18.58

4 -^-v- -20.26

3 -^-v- -30.09

2 -^-v- -281.1
1 -^-v- -281.1

## 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 = -75.4594510345 Hartrees