
1. A bonding orbital for O1C2 with 1.9910 electrons
__has 74.07% O 1 character in a s0.80 p3 hybrid
__has 25.93% C 2 character in a s0.45 p3 hybrid
2. A bonding orbital for O1C2 with 1.7807 electrons
__has 87.69% O 1 character in a ppi orbital ( 99.80% p 0.20% d)
__has 12.31% C 2 character in a ppi orbital ( 98.29% p 1.71% d)
3. A bonding orbital for O1C3 with 1.9910 electrons
__has 74.07% O 1 character in a s0.80 p3 hybrid
__has 25.93% C 3 character in a s0.45 p3 hybrid
4. A bonding orbital for C2C3 with 1.9923 electrons
__has 50.00% C 2 character in a s0.55 p3 hybrid
__has 50.00% C 3 character in a s0.55 p3 hybrid
8. A lone pair orbital for O1 with 1.9924 electrons
__made from a sp0.72 hybrid
9. A lone pair orbital for C2 with 1.9935 electrons
__made from a sp0.37 hybrid
10. A lone pair orbital for C3 with 1.9935 electrons
__made from a sp0.37 hybrid
11. A lone pair orbital for C3 with 0.2192 electrons
__made from a ppi orbital ( 98.29% p 1.71% d)
With core pairs on: O 1 C 2 C 3 
The interaction of bonding donor orbital, 1, for O1C2 with the antibonding acceptor orbital, 71, for O1C3 is 28.4 kJ/mol.
The interaction of the second bonding donor orbital, 2, for O1C2 with the second lone pair acceptor orbital, 11, for C3 is 521. kJ/mol.
The interaction of bonding donor orbital, 3, for O1C3 with the antibonding acceptor orbital, 69, for O1C2 is 28.4 kJ/mol.
14  1.084
13  0.985
12  3.540
11  5.496
10 ^v 7.073
9 ^v 7.993
8 ^v 10.95
7 ^v 13.46
6 ^v 16.04
5 ^v 17.28
4 ^v 31.00
3 ^v 270.1 2 ^v 270.1
1 ^v 511.2
Total electronic energy = 151.2455305856 Hartrees
* Note: The linear CCO triplet is lowest in energy. The linear CCO singlet is also lower in energy than the cyclic isomer.