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All results from a given calculation for Si2H6 (disilane)

using model chemistry: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-581.365747
Energy at 298.15K-581.371809
HF Energy-581.365747
Nuclear repulsion energy90.420969
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 HF/Def2TZVPP
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 2313 2097 0.00      
2 A1g 1024 928 0.00      
3 A1g 443 402 0.00      
4 A1u 137 125 0.00      
5 A2u 2299 2084 169.23      
6 A2u 942 854 661.76      
7 Eg 2295 2080 0.00      
7 Eg 2295 2080 0.00      
8 Eg 1020 924 0.00      
8 Eg 1020 924 0.00      
9 Eg 689 625 0.00      
9 Eg 689 625 0.00      
10 Eu 2305 2089 292.69      
10 Eu 2305 2089 292.69      
11 Eu 1035 938 117.58      
11 Eu 1035 938 117.58      
12 Eu 402 365 29.18      
12 Eu 402 365 29.18      

Unscaled Zero Point Vibrational Energy (zpe) 11324.5 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 10264.5 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 HF/Def2TZVPP
ABC
1.45147 0.16634 0.16634

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.182
Si2 0.000 0.000 -1.182
H3 0.000 1.386 1.696
H4 -1.200 -0.693 1.696
H5 1.200 -0.693 1.696
H6 0.000 -1.386 -1.696
H7 -1.200 0.693 -1.696
H8 1.200 0.693 -1.696

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.36341.47831.47831.47833.19433.19433.1943
Si22.36343.19433.19433.19431.47831.47831.4783
H31.47833.19432.40042.40044.38083.66463.6646
H41.47833.19432.40042.40043.66463.66464.3808
H51.47833.19432.40042.40043.66464.38083.6646
H63.19431.47834.38083.66463.66462.40042.4004
H73.19431.47833.66463.66464.38082.40042.4004
H83.19431.47833.66464.38083.66462.40042.4004

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.368 Si1 Si2 H7 110.368
Si1 Si2 H8 110.368 Si2 Si1 H3 110.368
Si2 Si1 H4 110.368 Si2 Si1 H5 110.368
H3 Si1 H4 108.560 H3 Si1 H5 108.560
H4 Si1 H5 108.560 H6 Si2 H7 108.560
H6 Si2 H8 108.560 H7 Si2 H8 108.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.282      
2 Si 0.282      
3 H -0.094      
4 H -0.094      
5 H -0.094      
6 H -0.094      
7 H -0.094      
8 H -0.094      


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