
1. A bonding orbital for O1C2 with 1.9936 electrons
__has 68.11% O 1 character in a sp2.33 hybrid
__has 31.89% C 2 character in a sp2.56 hybrid
2. A bonding orbital for O1C8 with 1.9914 electrons
__has 69.28% O 1 character in a sp2.49 hybrid
__has 30.72% C 8 character in a s0.82 p3 hybrid
3. A bonding orbital for C2O3 with 1.9980 electrons
__has 35.47% C 2 character in a sp1.86 hybrid
__has 64.53% O 3 character in a sp1.54 hybrid
4. A bonding orbital for C2O3 with 1.9930 electrons
__has 26.32% C 2 character in a ppi orbital ( 99.31% p 0.69% d)
__has 73.68% O 3 character in a ppi orbital ( 99.82% p 0.18% d)
5. A bonding orbital for C2C4 with 1.9877 electrons
__has 49.52% C 2 character in a sp1.67 hybrid
__has 50.48% C 4 character in a sp2.87 hybrid
6. A bonding orbital for C4H5 with 1.9817 electrons
__has 60.68% C 4 character in a s0.97 p3 hybrid
__has 39.32% H 5 character in a s orbital
7. A bonding orbital for C4H6 with 1.9911 electrons
__has 60.72% C 4 character in a sp2.96 hybrid
__has 39.28% H 6 character in a s orbital
8. A bonding orbital for C4H7 with 1.9814 electrons
__has 60.69% C 4 character in a s0.97 p3 hybrid
__has 39.31% H 7 character in a s orbital
9. A bonding orbital for C8H9 with 1.9933 electrons
__has 58.72% C 8 character in a sp2.85 hybrid
__has 41.28% H 9 character in a s orbital
10. A bonding orbital for C8H10 with 1.9961 electrons
__has 58.93% C 8 character in a sp2.78 hybrid
__has 41.07% H10 character in a s orbital
11. A bonding orbital for C8H11 with 1.9960 electrons
__has 58.90% C 8 character in a sp2.78 hybrid
__has 41.10% H11 character in a s orbital
17. A lone pair orbital for O1 with 1.9704 electrons
__made from a sp1.40 hybrid
18. A lone pair orbital for O1 with 1.8577 electrons
__made from a ppi orbital ( 99.95% p)
19. A lone pair orbital for O3 with 1.9766 electrons
__made from a sp0.64 hybrid
20. A lone pair orbital for O3 with 1.8863 electrons
__made from a ppi orbital ( 99.90% p 0.10% d)
149. A antibonding orbital for C2O3 with 0.1475 electrons
__has 73.68% C 2 character in a ppi orbital ( 99.31% p 0.69% d)
__has 26.32% O 3 character in a ppi orbital ( 99.82% p 0.18% d)
With core pairs on: O 1 C 2 O 3 C 4 C 8 
The interaction of bonding donor orbital, 6, for C4H5 with the second antibonding acceptor orbital, 149, for C2O3 is 24.7 kJ/mol.
The interaction of bonding donor orbital, 7, for C4H6 with the antibonding acceptor orbital, 146, for O1C2 is 20.7 kJ/mol.
The interaction of bonding donor orbital, 8, for C4H7 with the second antibonding acceptor orbital, 149, for C2O3 is 25.3 kJ/mol.
The interaction of lone pair donor orbital, 17, for O1 with the antibonding acceptor orbital, 148, for C2O3 is 44.3 kJ/mol.
The interaction of the second lone pair donor orbital, 18, for O1 with the second antibonding acceptor orbital, 149, for C2O3 is 245. kJ/mol.
The interaction of the second lone pair donor orbital, 18, for O1 with the antibonding acceptor orbital, 155, for C8H10 is 25.1 kJ/mol.
The interaction of the second lone pair donor orbital, 18, for O1 with the antibonding acceptor orbital, 156, for C8H11 is 25.4 kJ/mol.
The interaction of the second lone pair donor orbital, 20, for O3 with the antibonding acceptor orbital, 146, for O1C2 is 176. kJ/mol.
The interaction of the second lone pair donor orbital, 20, for O3 with the antibonding acceptor orbital, 150, for C2C4 is 97.7 kJ/mol.
24  1.984
23  1.624
22  0.781
21  1.221
20 ^v 6.493
19 ^v 7.401
18 ^v 8.682
17 ^v 9.058
16 ^v 9.826
15 ^v 10.24
14 ^v 10.57
13 ^v 11.61
12 ^v 12.00
11 ^v 12.22
10 ^v 13.98
9 ^v 17.27
8 ^v 19.00
7 ^v 25.15
6 ^v 27.37
5 ^v 266.6
4 ^v 267.7
3 ^v 269.8
2 ^v 506.2
1 ^v 507.8
Total electronic energy = 268.4880850339 Hartrees