
1. A bonding orbital for O1C2 with 1.9979 electrons
__has 65.09% O 1 character in a sp1.46 hybrid
__has 34.91% C 2 character in a sp1.93 hybrid
2. A bonding orbital for O1C2 with 1.9961 electrons
__has 69.72% O 1 character in a ppi orbital ( 99.82% p 0.18% d)
__has 30.28% C 2 character in a ppi orbital ( 99.44% p 0.56% d)
3. A bonding orbital for C2C3 with 1.9920 electrons
__has 48.03% C 2 character in a sp1.75 hybrid
__has 51.97% C 3 character in a sp2.90 hybrid
4. A bonding orbital for C2H10 with 1.9897 electrons
__has 56.20% C 2 character in a sp2.31 hybrid
__has 43.80% H10 character in a s orbital
5. A bonding orbital for C3C4 with 1.9940 electrons
__has 51.26% C 3 character in a sp2.39 hybrid
__has 48.74% C 4 character in a sp2.51 hybrid
6. A bonding orbital for C3H8 with 1.9758 electrons
__has 60.48% C 3 character in a s0.87 p3 hybrid
__has 39.52% H 8 character in a s orbital
7. A bonding orbital for C3H9 with 1.9754 electrons
__has 60.47% C 3 character in a s0.87 p3 hybrid
__has 39.53% H 9 character in a s orbital
8. A bonding orbital for C4H5 with 1.9919 electrons
__has 59.81% C 4 character in a s0.95 p3 hybrid
__has 40.19% H 5 character in a s orbital
9. A bonding orbital for C4H6 with 1.9923 electrons
__has 59.27% C 4 character in a s0.93 p3 hybrid
__has 40.73% H 6 character in a s orbital
10. A bonding orbital for C4H7 with 1.9922 electrons
__has 59.27% C 4 character in a s0.93 p3 hybrid
__has 40.73% H 7 character in a s orbital
15. A lone pair orbital for O1 with 1.9835 electrons
__made from a sp0.67 hybrid
16. A lone pair orbital for O1 with 1.9069 electrons
__made from a ppi orbital ( 99.92% p 0.08% d)
With core pairs on: O 1 C 2 C 3 C 4 
The interaction of bonding donor orbital, 6, for C3H8 with the second antibonding acceptor orbital, 124, for O1C2 is 24.4 kJ/mol.
The interaction of bonding donor orbital, 7, for C3H9 with the second antibonding acceptor orbital, 124, for O1C2 is 25.2 kJ/mol.
The interaction of the second lone pair donor orbital, 16, for O1 with the antibonding acceptor orbital, 125, for C2C3 is 100. kJ/mol.
The interaction of the second lone pair donor orbital, 16, for O1 with the antibonding acceptor orbital, 126, for C2H10 is 124. kJ/mol.
20  2.035
19  1.626
18  1.372
17  2.367
16 ^v 5.943
15 ^v 8.485
14 ^v 9.204
13 ^v 9.565
12 ^v 9.751
11 ^v 11.02
10 ^v 11.30
9 ^v 11.60
8 ^v 14.22
7 ^v 16.21
6 ^v 19.51
5 ^v 26.00
4 ^v 266.5
3 ^v 266.8
2 ^v 268.8
1 ^v 506.5
Total electronic energy = 193.2081807711 Hartrees