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All results from a given calculation for HSCH2SH (Methanedithiol)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-831.633546
Energy at 298.15K 
HF Energy-831.297486
Nuclear repulsion energy141.362779
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 CISD/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3154 2947 7.44      
2 A 2804 2620 2.88      
3 A 1571 1468 4.15      
4 A 1297 1212 1.12      
5 A 973 909 5.35      
6 A 654 611 3.41      
7 A 310 289 20.00      
8 A 255 238 7.44      
9 B 3205 2994 0.56      
10 B 2803 2619 6.45      
11 B 1361 1272 12.29      
12 B 1087 1016 27.40      
13 B 778 727 5.26      
14 B 768 718 14.84      
15 B 264 246 45.04      

Unscaled Zero Point Vibrational Energy (zpe) 10642.0 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 9943.9 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 CISD/3-21G*
ABC
0.87177 0.10544 0.09843

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.792
S2 0.000 1.545 -0.183
S3 0.000 -1.545 -0.183
H4 0.880 -0.048 1.432
H5 -0.880 0.048 1.432
H6 1.106 1.277 -0.884
H7 -1.106 -1.277 -0.884

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.82661.82661.08941.08942.37982.3798
S21.82663.08932.43292.37151.33643.1107
S31.82663.08932.37152.43293.11071.3364
H41.08942.43292.37151.76272.67833.2895
H51.08942.37152.43291.76273.28952.6783
H62.37981.33643.11072.67833.28953.3782
H72.37983.11071.33643.28952.67833.3782

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 96.366 C1 S3 H7 96.366
S2 C1 S3 115.485 S2 C1 H4 110.534
S2 C1 H5 106.058 S3 C1 H4 106.058
S3 C1 H5 110.534 H4 C1 H5 108.008
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability