return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for Si2H6 (disilane)

using model chemistry: B2PLYP=FULLultrafine/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B2PLYP=FULLultrafine/aug-cc-pVDZ
 hartrees
Energy at 0K-582.306711
Energy at 298.15K 
HF Energy-582.225331
Nuclear repulsion energy90.254727
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B2PLYP=FULLultrafine/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1g 2230 2146 0.00      
2 A1g 922 887 0.00      
3 A1g 429 413 0.00      
4 A1u 135 130 0.00      
5 A2u 2222 2138 115.96      
6 A2u 847 815 514.48      
7 Eg 2231 2147 0.00      
7 Eg 2231 2147 0.00      
8 Eg 949 913 0.00      
8 Eg 949 913 0.00      
9 Eg 634 610 0.00      
9 Eg 634 610 0.00      
10 Eu 2241 2157 196.35      
10 Eu 2241 2157 196.37      
11 Eu 963 927 83.65      
11 Eu 963 927 83.64      
12 Eu 369 356 21.82      
12 Eu 369 356 21.82      

Unscaled Zero Point Vibrational Energy (zpe) 10781.1 cm-1
Scaled (by 0.9623) Zero Point Vibrational Energy (zpe) 10374.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B2PLYP=FULLultrafine/aug-cc-pVDZ
ABC
1.42358 0.16691 0.16691

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/aug-cc-pVDZ

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.179
Si2 0.000 0.000 -1.179
H3 0.000 1.399 1.694
H4 -1.212 -0.700 1.694
H5 1.212 -0.700 1.694
H6 0.000 -1.399 -1.694
H7 -1.212 0.700 -1.694
H8 1.212 0.700 -1.694

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.35721.49141.49141.49143.19553.19553.1955
Si22.35723.19553.19553.19551.49141.49141.4914
H31.49143.19552.42382.42384.39483.66603.6660
H41.49143.19552.42382.42383.66603.66604.3948
H51.49143.19552.42382.42383.66604.39483.6660
H63.19551.49144.39483.66603.66602.42382.4238
H73.19551.49143.66603.66604.39482.42382.4238
H83.19551.49143.66604.39483.66602.42382.4238

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.227 Si1 Si2 H7 110.227
Si1 Si2 H8 110.227 Si2 Si1 H3 110.227
Si2 Si1 H4 110.227 Si2 Si1 H5 110.227
H3 Si1 H4 108.705 H3 Si1 H5 108.705
H4 Si1 H5 108.705 H6 Si2 H7 108.705
H6 Si2 H8 108.705 H7 Si2 H8 108.705
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability