
1. A bonding orbital for Si1Si2 with 1.9376 electrons
__has 46.93% Si 1 character in a s0.32 p3 hybrid
__has 53.07% Si 2 character in a s0.22 p3 hybrid
2. A bonding orbital for Si1Si4 with 1.7031 electrons
__has 55.30% Si 1 character in a s0.38 p3 hybrid
__has 44.70% Si 4 character in a s0.09 p3 hybrid
3. A bonding orbital for Si2Si3 with 1.7499 electrons
__has 56.59% Si 2 character in a s0.31 p3 hybrid
__has 43.41% Si 3 character in a s0.21 p3 d0.05 hybrid
4. A bonding orbital for Si2Si4 with 1.4799 electrons
__has 55.36% Si 2 character in a s0.33 p3 d0.05 hybrid
__has 44.64% Si 4 character in a s0.16 p3 d0.05 hybrid
25. A lone pair orbital for Si1 with 1.9680 electrons
__made from a sp0.26 hybrid
26. A lone pair orbital for Si1 with 0.4570 electrons
__made from a p3 d0.08 hybrid
27. A lone pair orbital for Si2 with 1.9436 electrons
__made from a sp0.33 hybrid
28. A lone pair orbital for Si3 with 1.9384 electrons
__made from a sp0.15 hybrid
29. A lone pair orbital for Si3 with 0.4921 electrons
__made from a s0.11 p3 d0.05 hybrid
30. A lone pair orbital for Si3 with 0.1510 electrons
__made from a s0.52 p3 d0.15 hybrid
31. A lone pair orbital for Si4 with 1.9103 electrons
__made from a sp0.13 hybrid
32. A lone pair orbital for Si4 with 0.1082 electrons
__made from a s0.17 p3 d0.05 hybrid
With core pairs on:Si 1 Si 1 Si 1 Si 1 Si 1 Si 2 Si 2 Si 2 Si 2 Si 2 Si 3 Si 3 Si 3 Si 3 Si 3 Si 4 Si 4 Si 4 Si 4 Si 4 
The interaction of bonding donor orbital, 1, for Si1Si2 with the bonding acceptor orbital, 4, for Si2Si4 is 107. kJ/mol.
The interaction of bonding donor orbital, 1, for Si1Si2 with the second lone pair acceptor orbital, 29, for Si3 is 149. kJ/mol.
The interaction of bonding donor orbital, 1, for Si1Si2 with the third lone pair acceptor orbital, 30, for Si3 is 72.2 kJ/mol.
The interaction of bonding donor orbital, 1, for Si1Si2 with the second lone pair acceptor orbital, 32, for Si4 is 111. kJ/mol.
The interaction of bonding donor orbital, 1, for Si1Si2 with the antibonding acceptor orbital, 121, for Si1Si2 is 177. kJ/mol.
The interaction of bonding donor orbital, 1, for Si1Si2 with the antibonding acceptor orbital, 122, for Si1Si4 is 60.4 kJ/mol.
The interaction of bonding donor orbital, 2, for Si1Si4 with the bonding acceptor orbital, 4, for Si2Si4 is 141. kJ/mol.
The interaction of bonding donor orbital, 2, for Si1Si4 with the second lone pair acceptor orbital, 29, for Si3 is 394. kJ/mol.
The interaction of bonding donor orbital, 2, for Si1Si4 with the third lone pair acceptor orbital, 30, for Si3 is 104. kJ/mol.
The interaction of bonding donor orbital, 2, for Si1Si4 with the second lone pair acceptor orbital, 32, for Si4 is 317. kJ/mol.
The interaction of bonding donor orbital, 2, for Si1Si4 with the antibonding acceptor orbital, 122, for Si1Si4 is 221. kJ/mol.
The interaction of bonding donor orbital, 3, for Si2Si3 with the bonding acceptor orbital, 4, for Si2Si4 is 1126 kJ/mol.
The interaction of bonding donor orbital, 3, for Si2Si3 with the third lone pair acceptor orbital, 30, for Si3 is 298. kJ/mol.
The interaction of bonding donor orbital, 3, for Si2Si3 with the antibonding acceptor orbital, 122, for Si1Si4 is 32.7 kJ/mol.
The interaction of bonding donor orbital, 3, for Si2Si3 with the antibonding acceptor orbital, 123, for Si2Si3 is 25.5 kJ/mol.
The interaction of bonding donor orbital, 3, for Si2Si3 with the antibonding acceptor orbital, 124, for Si2Si4 is 24.9 kJ/mol.
The interaction of bonding donor orbital, 4, for Si2Si4 with the third lone pair acceptor orbital, 30, for Si3 is 99.2 kJ/mol.
The interaction of bonding donor orbital, 4, for Si2Si4 with the second lone pair acceptor orbital, 32, for Si4 is 134. kJ/mol.
The interaction of bonding donor orbital, 4, for Si2Si4 with the antibonding acceptor orbital, 122, for Si1Si4 is 23.5 kJ/mol.
The interaction of bonding donor orbital, 4, for Si2Si4 with the antibonding acceptor orbital, 123, for Si2Si3 is 25.6 kJ/mol.
The interaction of bonding donor orbital, 4, for Si2Si4 with the antibonding acceptor orbital, 124, for Si2Si4 is 29.4 kJ/mol.
The interaction of lone pair donor orbital, 25, for Si1 with the second lone pair acceptor orbital, 29, for Si3 is 90.4 kJ/mol.
The interaction of the second lone pair donor orbital, 26, for Si1 with the bonding acceptor orbital, 4, for Si2Si4 is 96.2 kJ/mol.
The interaction of the second lone pair donor orbital, 26, for Si1 with the second lone pair acceptor orbital, 29, for Si3 is 345. kJ/mol.
The interaction of lone pair donor orbital, 27, for Si2 with the second lone pair acceptor orbital, 32, for Si4 is 25.4 kJ/mol.
The interaction of lone pair donor orbital, 28, for Si3 with the second lone pair acceptor orbital, 26, for Si1 is 191. kJ/mol.
The interaction of lone pair donor orbital, 28, for Si3 with the second lone pair acceptor orbital, 29, for Si3 is 191. kJ/mol.
The interaction of lone pair donor orbital, 28, for Si3 with the third lone pair acceptor orbital, 30, for Si3 is 35.8 kJ/mol.
The interaction of lone pair donor orbital, 28, for Si3 with the second lone pair acceptor orbital, 32, for Si4 is 132. kJ/mol.
The interaction of the second lone pair donor orbital, 29, for Si3 with the third lone pair acceptor orbital, 30, for Si3 is 116. kJ/mol.
The interaction of the second lone pair donor orbital, 29, for Si3 with the second lone pair acceptor orbital, 32, for Si4 is 91.4 kJ/mol.
The interaction of the third lone pair donor orbital, 30, for Si3 with the second lone pair acceptor orbital, 32, for Si4 is 793. kJ/mol.
The interaction of lone pair donor orbital, 31, for Si4 with the bonding acceptor orbital, 4, for Si2Si4 is 131. kJ/mol.
The interaction of lone pair donor orbital, 31, for Si4 with the second lone pair acceptor orbital, 26, for Si1 is 43.8 kJ/mol.
The interaction of lone pair donor orbital, 31, for Si4 with the third lone pair acceptor orbital, 30, for Si3 is 263. kJ/mol.
The interaction of lone pair donor orbital, 31, for Si4 with the second lone pair acceptor orbital, 32, for Si4 is 125. kJ/mol.
32  1.320 31  1.322
30  5.248 29  5.250
28 ^v 5.682 27 ^v 5.682 26 ^v 5.685
25 ^v 6.405
24 ^v 10.59 23 ^v 10.60 22 ^v 10.60
21 ^v 15.61
20 ^v 95.10 19 ^v 95.10 18 ^v 95.10
17 ^v 95.11
16 ^v 95.19 15 ^v 95.20 14 ^v 95.20 13 ^v 95.20 12 ^v 95.20 11 ^v 95.20 10 ^v 95.21 9 ^v 95.21
8 ^v 137.5 7 ^v 137.5 6 ^v 137.5 5 ^v 137.5
4 ^v 1773. 3 ^v 1773. 2 ^v 1773. 1 ^v 1773.
Total electronic energy = 1157.9149459467 Hartrees
* Also check the planar conformer