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All results from a given calculation for Si2H6 (disilane)

using model chemistry: CCD/aug-cc-pV(T+d)Z

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at CCD/aug-cc-pV(T+d)Z
 hartrees
Energy at 0K-581.693529
Energy at 298.15K-581.699728
HF Energy-581.376706
Nuclear repulsion energy90.658311
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 CCD/aug-cc-pV(T+d)Z
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 2242 2242 0.00      
2 A1g 944 944 0.00      
3 A1g 439 439 0.00      
4 A1u 140 140 0.00      
5 A2u 2233 2233 121.01      
6 A2u 868 868 536.38      
7 Eg 2240 2240 0.00      
7 Eg 2240 2240 0.00      
8 Eg 958 958 0.00      
8 Eg 958 958 0.00      
9 Eg 644 644 0.00      
9 Eg 644 644 0.00      
10 Eu 2249 2249 203.82      
10 Eu 2249 2249 203.83      
11 Eu 972 972 89.58      
11 Eu 972 972 89.59      
12 Eu 377 377 23.33      
12 Eu 377 377 23.33      

Unscaled Zero Point Vibrational Energy (zpe) 10871.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10871.6 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 CCD/aug-cc-pV(T+d)Z
ABC
1.44263 0.16806 0.16806

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pV(T+d)Z

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.175
Si2 0.000 0.000 -1.175
H3 0.000 1.390 1.688
H4 -1.204 -0.695 1.688
H5 1.204 -0.695 1.688
H6 0.000 -1.390 -1.688
H7 -1.204 0.695 -1.688
H8 1.204 0.695 -1.688

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.34981.48171.48171.48173.18243.18243.1824
Si22.34983.18243.18243.18241.48171.48171.4817
H31.48173.18242.40782.40784.37323.65073.6507
H41.48173.18242.40782.40783.65073.65074.3732
H51.48173.18242.40782.40783.65074.37323.6507
H63.18241.48174.37323.65073.65072.40782.4078
H73.18241.48173.65073.65074.37322.40782.4078
H83.18241.48173.65074.37323.65072.40782.4078

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.254 Si1 Si2 H7 110.254
Si1 Si2 H8 110.254 Si2 Si1 H3 110.254
Si2 Si1 H4 110.254 Si2 Si1 H5 110.254
H3 Si1 H4 108.677 H3 Si1 H5 108.677
H4 Si1 H5 108.677 H6 Si2 H7 108.677
H6 Si2 H8 108.677 H7 Si2 H8 108.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability